./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:31:05,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:31:05,458 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:31:05,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:31:05,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:31:05,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:31:05,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:31:05,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:31:05,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:31:05,486 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:31:05,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:31:05,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:31:05,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:31:05,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:31:05,487 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:31:05,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:31:05,487 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:31:05,487 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:31:05,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:31:05,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:31:05,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:31:05,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:31:05,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:31:05,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:31:05,489 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:31:05,489 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:31:05,489 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:31:05,490 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:31:05,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:31:05,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:31:05,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:31:05,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:31:05,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:31:05,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:31:05,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:31:05,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:31:05,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:31:05,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:31:05,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:31:05,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:31:05,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:31:05,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:31:05,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:31:05,493 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-01-27 15:31:05,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:31:05,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:31:05,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:31:05,687 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:31:05,688 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:31:05,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-01-27 15:31:06,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:31:06,825 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:31:06,826 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-01-27 15:31:06,832 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de631248/6e2d984bc0ac49db80fc480e1ae559b9/FLAG0b7fe8418 [2024-01-27 15:31:06,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0de631248/6e2d984bc0ac49db80fc480e1ae559b9 [2024-01-27 15:31:06,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:31:06,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:31:06,849 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:31:06,849 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:31:06,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:31:06,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:31:06" (1/1) ... [2024-01-27 15:31:06,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccd433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:06, skipping insertion in model container [2024-01-27 15:31:06,855 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:31:06" (1/1) ... [2024-01-27 15:31:06,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:31:07,037 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2024-01-27 15:31:07,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:31:07,061 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:31:07,101 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2024-01-27 15:31:07,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:31:07,137 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:31:07,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07 WrapperNode [2024-01-27 15:31:07,138 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:31:07,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:31:07,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:31:07,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:31:07,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,181 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2024-01-27 15:31:07,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:31:07,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:31:07,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:31:07,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:31:07,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,202 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,222 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 2, 7]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:31:07,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,251 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:31:07,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:31:07,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:31:07,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:31:07,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (1/1) ... [2024-01-27 15:31:07,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:31:07,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:07,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:31:07,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:31:07,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:31:07,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:31:07,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:31:07,324 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:31:07,324 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:31:07,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:31:07,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:31:07,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:31:07,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:31:07,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:31:07,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:31:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:31:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:31:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:31:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:31:07,330 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:31:07,417 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:31:07,419 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:31:07,745 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:31:07,745 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:31:08,084 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:31:08,085 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:31:08,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:31:08 BoogieIcfgContainer [2024-01-27 15:31:08,086 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:31:08,088 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:31:08,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:31:08,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:31:08,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:31:06" (1/3) ... [2024-01-27 15:31:08,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14536010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:31:08, skipping insertion in model container [2024-01-27 15:31:08,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:31:07" (2/3) ... [2024-01-27 15:31:08,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14536010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:31:08, skipping insertion in model container [2024-01-27 15:31:08,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:31:08" (3/3) ... [2024-01-27 15:31:08,094 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-01-27 15:31:08,100 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:31:08,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:31:08,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:31:08,107 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:31:08,139 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:31:08,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:31:08,195 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:31:08,195 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:31:08,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:31:08,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:31:08,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:31:08,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:31:08,219 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a00702e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:31:08,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:31:08,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:31:08,229 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:31:08,230 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:31:08,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:08,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:08,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:08,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:08,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1642167946, now seen corresponding path program 1 times [2024-01-27 15:31:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805377292] [2024-01-27 15:31:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805377292] [2024-01-27 15:31:08,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805377292] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:31:08,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:31:08,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:31:08,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762287562] [2024-01-27 15:31:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:31:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:31:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:31:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:31:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:08,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:08,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:08,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:08,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:08,922 INFO L124 PetriNetUnfolderBase]: 101/166 cut-off events. [2024-01-27 15:31:08,922 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-01-27 15:31:08,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 166 events. 101/166 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 481 event pairs, 9 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2024-01-27 15:31:08,927 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 28 selfloop transitions, 10 changer transitions 1/42 dead transitions. [2024-01-27 15:31:08,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 189 flow [2024-01-27 15:31:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:31:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:31:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-01-27 15:31:08,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-01-27 15:31:08,940 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 65 transitions. [2024-01-27 15:31:08,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 189 flow [2024-01-27 15:31:08,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 42 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:31:08,945 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2024-01-27 15:31:08,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2024-01-27 15:31:08,950 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-01-27 15:31:08,950 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2024-01-27 15:31:08,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:08,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:08,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:31:08,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:08,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1394700661, now seen corresponding path program 1 times [2024-01-27 15:31:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:08,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874434513] [2024-01-27 15:31:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:09,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:09,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874434513] [2024-01-27 15:31:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874434513] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:31:09,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:31:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:31:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812208174] [2024-01-27 15:31:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:31:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:31:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:31:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:31:09,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:09,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:09,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:09,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:09,235 INFO L124 PetriNetUnfolderBase]: 131/226 cut-off events. [2024-01-27 15:31:09,235 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2024-01-27 15:31:09,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 226 events. 131/226 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 777 event pairs, 43 based on Foata normal form. 12/216 useless extension candidates. Maximal degree in co-relation 386. Up to 117 conditions per place. [2024-01-27 15:31:09,238 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-01-27 15:31:09,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 238 flow [2024-01-27 15:31:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:31:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:31:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-01-27 15:31:09,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-01-27 15:31:09,240 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 4 states and 47 transitions. [2024-01-27 15:31:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 238 flow [2024-01-27 15:31:09,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 232 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-27 15:31:09,245 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 155 flow [2024-01-27 15:31:09,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-01-27 15:31:09,246 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2024-01-27 15:31:09,246 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 155 flow [2024-01-27 15:31:09,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:09,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:31:09,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:09,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1626431928, now seen corresponding path program 1 times [2024-01-27 15:31:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:09,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16335787] [2024-01-27 15:31:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:09,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:09,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16335787] [2024-01-27 15:31:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16335787] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:31:09,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:31:09,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:31:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623963740] [2024-01-27 15:31:09,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:31:09,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:31:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:31:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:31:09,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:09,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:09,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:09,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:09,445 INFO L124 PetriNetUnfolderBase]: 105/187 cut-off events. [2024-01-27 15:31:09,445 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-01-27 15:31:09,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 187 events. 105/187 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 617 event pairs, 30 based on Foata normal form. 5/191 useless extension candidates. Maximal degree in co-relation 547. Up to 104 conditions per place. [2024-01-27 15:31:09,447 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/40 dead transitions. [2024-01-27 15:31:09,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 272 flow [2024-01-27 15:31:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:31:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:31:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-01-27 15:31:09,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-01-27 15:31:09,450 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 155 flow. Second operand 4 states and 45 transitions. [2024-01-27 15:31:09,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 272 flow [2024-01-27 15:31:09,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 268 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-27 15:31:09,453 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 141 flow [2024-01-27 15:31:09,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-01-27 15:31:09,454 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2024-01-27 15:31:09,455 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 141 flow [2024-01-27 15:31:09,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:09,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:09,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:31:09,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:09,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -900029099, now seen corresponding path program 1 times [2024-01-27 15:31:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:09,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500002951] [2024-01-27 15:31:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:09,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500002951] [2024-01-27 15:31:09,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500002951] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945766624] [2024-01-27 15:31:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:09,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:09,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:09,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:31:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:09,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:31:09,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:09,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945766624] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:09,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:31:09,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-27 15:31:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348617475] [2024-01-27 15:31:09,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:31:09,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:31:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:31:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:31:09,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:09,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:09,842 INFO L124 PetriNetUnfolderBase]: 82/140 cut-off events. [2024-01-27 15:31:09,842 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-01-27 15:31:09,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 140 events. 82/140 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 372 event pairs, 12 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 490. Up to 89 conditions per place. [2024-01-27 15:31:09,844 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2024-01-27 15:31:09,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 251 flow [2024-01-27 15:31:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:31:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:31:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-01-27 15:31:09,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-01-27 15:31:09,846 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 141 flow. Second operand 5 states and 48 transitions. [2024-01-27 15:31:09,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 251 flow [2024-01-27 15:31:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 209 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-01-27 15:31:09,849 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 140 flow [2024-01-27 15:31:09,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-27 15:31:09,851 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2024-01-27 15:31:09,851 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 140 flow [2024-01-27 15:31:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:09,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:09,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:09,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:10,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:10,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:10,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1162304328, now seen corresponding path program 1 times [2024-01-27 15:31:10,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:10,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691309204] [2024-01-27 15:31:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:10,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:10,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:10,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691309204] [2024-01-27 15:31:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691309204] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:10,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956851766] [2024-01-27 15:31:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:10,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:10,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:10,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:10,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:31:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:10,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:31:10,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:10,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:10,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956851766] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:10,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:31:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-27 15:31:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384118605] [2024-01-27 15:31:10,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:31:10,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:31:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:31:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:31:10,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:10,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:10,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:10,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:10,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:10,393 INFO L124 PetriNetUnfolderBase]: 62/108 cut-off events. [2024-01-27 15:31:10,393 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-01-27 15:31:10,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 108 events. 62/108 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 221 event pairs, 7 based on Foata normal form. 9/114 useless extension candidates. Maximal degree in co-relation 372. Up to 86 conditions per place. [2024-01-27 15:31:10,394 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 27 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-01-27 15:31:10,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 232 flow [2024-01-27 15:31:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:31:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:31:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-01-27 15:31:10,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-01-27 15:31:10,395 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 140 flow. Second operand 5 states and 48 transitions. [2024-01-27 15:31:10,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 232 flow [2024-01-27 15:31:10,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:31:10,397 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 161 flow [2024-01-27 15:31:10,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-01-27 15:31:10,399 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-27 15:31:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 161 flow [2024-01-27 15:31:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:10,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:10,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:10,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:10,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:10,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:10,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 356427372, now seen corresponding path program 1 times [2024-01-27 15:31:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604078606] [2024-01-27 15:31:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604078606] [2024-01-27 15:31:11,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604078606] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:11,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190537293] [2024-01-27 15:31:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:11,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:11,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:11,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:31:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:11,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:31:11,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:31:11,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2024-01-27 15:31:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:11,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:12,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190537293] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:12,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:12,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-01-27 15:31:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866898760] [2024-01-27 15:31:12,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:31:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:31:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:31:12,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:12,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 161 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:12,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:12,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:12,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:12,455 INFO L124 PetriNetUnfolderBase]: 96/177 cut-off events. [2024-01-27 15:31:12,455 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-01-27 15:31:12,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 177 events. 96/177 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 498 event pairs, 0 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 533. Up to 100 conditions per place. [2024-01-27 15:31:12,456 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 46 selfloop transitions, 25 changer transitions 4/78 dead transitions. [2024-01-27 15:31:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 498 flow [2024-01-27 15:31:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:31:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:31:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-01-27 15:31:12,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-01-27 15:31:12,459 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 161 flow. Second operand 12 states and 127 transitions. [2024-01-27 15:31:12,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 498 flow [2024-01-27 15:31:12,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 78 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:31:12,460 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 351 flow [2024-01-27 15:31:12,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=351, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-01-27 15:31:12,462 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2024-01-27 15:31:12,462 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 351 flow [2024-01-27 15:31:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:12,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:12,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:12,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:12,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -746252018, now seen corresponding path program 2 times [2024-01-27 15:31:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:12,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168810821] [2024-01-27 15:31:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168810821] [2024-01-27 15:31:13,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168810821] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740835198] [2024-01-27 15:31:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:31:13,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:13,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:13,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:31:13,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:31:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:13,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:31:13,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:13,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2024-01-27 15:31:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:13,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:13,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:13,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 145 [2024-01-27 15:31:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:14,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740835198] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:14,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:14,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-27 15:31:14,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958872465] [2024-01-27 15:31:14,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:31:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:31:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:31:14,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:14,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 351 flow. Second operand has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:14,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:14,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:14,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:14,538 INFO L124 PetriNetUnfolderBase]: 107/198 cut-off events. [2024-01-27 15:31:14,538 INFO L125 PetriNetUnfolderBase]: For 464/464 co-relation queries the response was YES. [2024-01-27 15:31:14,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 198 events. 107/198 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 595 event pairs, 4 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 740. Up to 132 conditions per place. [2024-01-27 15:31:14,541 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 32 selfloop transitions, 33 changer transitions 4/72 dead transitions. [2024-01-27 15:31:14,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 605 flow [2024-01-27 15:31:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:31:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:31:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 130 transitions. [2024-01-27 15:31:14,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-01-27 15:31:14,543 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 351 flow. Second operand 14 states and 130 transitions. [2024-01-27 15:31:14,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 605 flow [2024-01-27 15:31:14,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 563 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-01-27 15:31:14,547 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 458 flow [2024-01-27 15:31:14,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=458, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-01-27 15:31:14,548 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2024-01-27 15:31:14,548 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 458 flow [2024-01-27 15:31:14,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:14,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:14,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:14,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:14,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:14,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:14,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1138325468, now seen corresponding path program 3 times [2024-01-27 15:31:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:14,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921038099] [2024-01-27 15:31:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:15,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:15,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921038099] [2024-01-27 15:31:15,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921038099] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361275295] [2024-01-27 15:31:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:31:15,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:15,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:15,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:31:15,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:31:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:15,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:31:15,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:15,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:31:15,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 59 [2024-01-27 15:31:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:15,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361275295] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:16,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2024-01-27 15:31:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650299841] [2024-01-27 15:31:16,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:16,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:31:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:31:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:31:16,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:16,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 458 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:16,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:16,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:16,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:16,382 INFO L124 PetriNetUnfolderBase]: 112/207 cut-off events. [2024-01-27 15:31:16,382 INFO L125 PetriNetUnfolderBase]: For 582/582 co-relation queries the response was YES. [2024-01-27 15:31:16,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 207 events. 112/207 cut-off events. For 582/582 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 630 event pairs, 2 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 904. Up to 154 conditions per place. [2024-01-27 15:31:16,384 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 47 selfloop transitions, 23 changer transitions 4/77 dead transitions. [2024-01-27 15:31:16,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 679 flow [2024-01-27 15:31:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:31:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:31:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-01-27 15:31:16,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-01-27 15:31:16,385 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 458 flow. Second operand 11 states and 114 transitions. [2024-01-27 15:31:16,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 679 flow [2024-01-27 15:31:16,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 543 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-01-27 15:31:16,388 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 391 flow [2024-01-27 15:31:16,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=391, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-01-27 15:31:16,388 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 41 predicate places. [2024-01-27 15:31:16,388 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 391 flow [2024-01-27 15:31:16,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:16,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:16,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:16,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:16,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:16,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:16,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:16,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1843290926, now seen corresponding path program 4 times [2024-01-27 15:31:16,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:16,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070972051] [2024-01-27 15:31:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:17,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070972051] [2024-01-27 15:31:17,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070972051] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:17,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782558582] [2024-01-27 15:31:17,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:31:17,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:17,578 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:17,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:31:17,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:31:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:17,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:31:17,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:17,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:31:17,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-01-27 15:31:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:17,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782558582] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:18,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-01-27 15:31:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566203479] [2024-01-27 15:31:18,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:31:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:31:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:31:18,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:18,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 391 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:18,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:18,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:18,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:18,578 INFO L124 PetriNetUnfolderBase]: 117/218 cut-off events. [2024-01-27 15:31:18,578 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2024-01-27 15:31:18,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 218 events. 117/218 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 687 event pairs, 2 based on Foata normal form. 1/214 useless extension candidates. Maximal degree in co-relation 885. Up to 160 conditions per place. [2024-01-27 15:31:18,580 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 44 selfloop transitions, 28 changer transitions 4/79 dead transitions. [2024-01-27 15:31:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 643 flow [2024-01-27 15:31:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:31:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:31:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 115 transitions. [2024-01-27 15:31:18,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-01-27 15:31:18,581 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 391 flow. Second operand 12 states and 115 transitions. [2024-01-27 15:31:18,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 643 flow [2024-01-27 15:31:18,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 573 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-01-27 15:31:18,585 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 447 flow [2024-01-27 15:31:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=447, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-01-27 15:31:18,586 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 44 predicate places. [2024-01-27 15:31:18,586 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 447 flow [2024-01-27 15:31:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:18,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:18,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:18,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:18,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:18,799 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:18,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -600174474, now seen corresponding path program 5 times [2024-01-27 15:31:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:18,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210327249] [2024-01-27 15:31:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:18,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:19,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210327249] [2024-01-27 15:31:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210327249] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287227797] [2024-01-27 15:31:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:31:19,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:19,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:19,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:31:19,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:31:19,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:19,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:31:19,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:19,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:31:19,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-01-27 15:31:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:19,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:20,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287227797] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:20,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:20,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-01-27 15:31:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384643082] [2024-01-27 15:31:20,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:20,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:31:20,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:31:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:31:20,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:20,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 447 flow. Second operand has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:20,699 INFO L124 PetriNetUnfolderBase]: 256/448 cut-off events. [2024-01-27 15:31:20,699 INFO L125 PetriNetUnfolderBase]: For 1930/1930 co-relation queries the response was YES. [2024-01-27 15:31:20,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 448 events. 256/448 cut-off events. For 1930/1930 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1735 event pairs, 12 based on Foata normal form. 3/442 useless extension candidates. Maximal degree in co-relation 1781. Up to 216 conditions per place. [2024-01-27 15:31:20,702 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 90 selfloop transitions, 56 changer transitions 7/156 dead transitions. [2024-01-27 15:31:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 156 transitions, 1393 flow [2024-01-27 15:31:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:31:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:31:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 231 transitions. [2024-01-27 15:31:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:31:20,704 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 447 flow. Second operand 21 states and 231 transitions. [2024-01-27 15:31:20,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 156 transitions, 1393 flow [2024-01-27 15:31:20,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 156 transitions, 1300 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-27 15:31:20,709 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 917 flow [2024-01-27 15:31:20,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=917, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-01-27 15:31:20,710 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2024-01-27 15:31:20,710 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 917 flow [2024-01-27 15:31:20,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.055555555555555) internal successors, (127), 18 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:20,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:20,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:20,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:20,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:20,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:20,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1284403012, now seen corresponding path program 6 times [2024-01-27 15:31:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163214689] [2024-01-27 15:31:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163214689] [2024-01-27 15:31:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163214689] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659368034] [2024-01-27 15:31:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:31:21,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:21,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:21,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:21,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:31:21,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:31:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:21,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:31:21,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:21,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-01-27 15:31:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:21,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:21,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:21,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 142 [2024-01-27 15:31:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659368034] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:22,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2024-01-27 15:31:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162059062] [2024-01-27 15:31:22,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:22,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:31:22,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:31:22,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:31:22,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:22,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 917 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:22,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:22,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:22,778 INFO L124 PetriNetUnfolderBase]: 367/653 cut-off events. [2024-01-27 15:31:22,778 INFO L125 PetriNetUnfolderBase]: For 6868/6868 co-relation queries the response was YES. [2024-01-27 15:31:22,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 653 events. 367/653 cut-off events. For 6868/6868 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2826 event pairs, 2 based on Foata normal form. 2/652 useless extension candidates. Maximal degree in co-relation 3403. Up to 241 conditions per place. [2024-01-27 15:31:22,784 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 78 selfloop transitions, 84 changer transitions 6/171 dead transitions. [2024-01-27 15:31:22,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 171 transitions, 2033 flow [2024-01-27 15:31:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:31:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:31:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 191 transitions. [2024-01-27 15:31:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-01-27 15:31:22,785 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 917 flow. Second operand 18 states and 191 transitions. [2024-01-27 15:31:22,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 171 transitions, 2033 flow [2024-01-27 15:31:22,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 171 transitions, 1692 flow, removed 152 selfloop flow, removed 9 redundant places. [2024-01-27 15:31:22,800 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1458 flow [2024-01-27 15:31:22,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1458, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-01-27 15:31:22,801 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 76 predicate places. [2024-01-27 15:31:22,801 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1458 flow [2024-01-27 15:31:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:22,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:22,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:22,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:31:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:31:23,013 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:23,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1459454254, now seen corresponding path program 7 times [2024-01-27 15:31:23,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:23,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813390817] [2024-01-27 15:31:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813390817] [2024-01-27 15:31:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813390817] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034099411] [2024-01-27 15:31:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:31:23,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:23,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:23,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:31:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:23,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:31:23,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034099411] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:23,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-27 15:31:23,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868490895] [2024-01-27 15:31:23,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:23,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:31:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:31:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:31:23,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:23,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:23,384 INFO L124 PetriNetUnfolderBase]: 231/447 cut-off events. [2024-01-27 15:31:23,384 INFO L125 PetriNetUnfolderBase]: For 5316/5316 co-relation queries the response was YES. [2024-01-27 15:31:23,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 447 events. 231/447 cut-off events. For 5316/5316 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1906 event pairs, 51 based on Foata normal form. 24/468 useless extension candidates. Maximal degree in co-relation 2903. Up to 187 conditions per place. [2024-01-27 15:31:23,388 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 97 selfloop transitions, 16 changer transitions 4/120 dead transitions. [2024-01-27 15:31:23,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 120 transitions, 1539 flow [2024-01-27 15:31:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:31:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:31:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-01-27 15:31:23,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-01-27 15:31:23,389 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1458 flow. Second operand 7 states and 76 transitions. [2024-01-27 15:31:23,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 120 transitions, 1539 flow [2024-01-27 15:31:23,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 1013 flow, removed 210 selfloop flow, removed 21 redundant places. [2024-01-27 15:31:23,402 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 629 flow [2024-01-27 15:31:23,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=629, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-01-27 15:31:23,403 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2024-01-27 15:31:23,403 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 629 flow [2024-01-27 15:31:23,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:23,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:23,404 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:23,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:23,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:23,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:23,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:23,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1548622127, now seen corresponding path program 8 times [2024-01-27 15:31:23,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:23,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610038506] [2024-01-27 15:31:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:23,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610038506] [2024-01-27 15:31:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610038506] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723296570] [2024-01-27 15:31:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:31:23,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:23,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:23,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:23,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:31:23,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:31:23,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:23,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:31:23,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723296570] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:23,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:23,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2024-01-27 15:31:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588362015] [2024-01-27 15:31:23,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:23,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:31:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:31:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:31:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 629 flow. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:24,063 INFO L124 PetriNetUnfolderBase]: 170/354 cut-off events. [2024-01-27 15:31:24,064 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2024-01-27 15:31:24,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 354 events. 170/354 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1469 event pairs, 6 based on Foata normal form. 34/385 useless extension candidates. Maximal degree in co-relation 1488. Up to 84 conditions per place. [2024-01-27 15:31:24,066 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 63 selfloop transitions, 41 changer transitions 25/132 dead transitions. [2024-01-27 15:31:24,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 1175 flow [2024-01-27 15:31:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:31:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:31:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 160 transitions. [2024-01-27 15:31:24,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-01-27 15:31:24,068 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 629 flow. Second operand 15 states and 160 transitions. [2024-01-27 15:31:24,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 1175 flow [2024-01-27 15:31:24,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 132 transitions, 1124 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-01-27 15:31:24,076 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 775 flow [2024-01-27 15:31:24,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=775, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-01-27 15:31:24,077 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2024-01-27 15:31:24,077 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 775 flow [2024-01-27 15:31:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:24,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:24,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:24,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:24,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:31:24,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:24,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1853976563, now seen corresponding path program 9 times [2024-01-27 15:31:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:24,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750867841] [2024-01-27 15:31:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:24,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:24,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750867841] [2024-01-27 15:31:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750867841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045620143] [2024-01-27 15:31:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:31:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:24,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:24,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:31:24,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:31:24,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:24,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:31:24,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:24,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045620143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:24,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:31:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999763759] [2024-01-27 15:31:24,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:31:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:31:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:31:24,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:24,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 775 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:24,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:24,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:24,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:24,665 INFO L124 PetriNetUnfolderBase]: 143/279 cut-off events. [2024-01-27 15:31:24,665 INFO L125 PetriNetUnfolderBase]: For 1377/1377 co-relation queries the response was YES. [2024-01-27 15:31:24,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 279 events. 143/279 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 983 event pairs, 9 based on Foata normal form. 22/300 useless extension candidates. Maximal degree in co-relation 1482. Up to 182 conditions per place. [2024-01-27 15:31:24,667 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 61 selfloop transitions, 17 changer transitions 0/81 dead transitions. [2024-01-27 15:31:24,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 937 flow [2024-01-27 15:31:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:31:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:31:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2024-01-27 15:31:24,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-27 15:31:24,668 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 775 flow. Second operand 8 states and 70 transitions. [2024-01-27 15:31:24,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 937 flow [2024-01-27 15:31:24,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 747 flow, removed 75 selfloop flow, removed 15 redundant places. [2024-01-27 15:31:24,674 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 614 flow [2024-01-27 15:31:24,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=614, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-01-27 15:31:24,674 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 45 predicate places. [2024-01-27 15:31:24,675 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 614 flow [2024-01-27 15:31:24,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:24,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:24,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:24,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:31:24,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:24,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1742610538, now seen corresponding path program 10 times [2024-01-27 15:31:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:24,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153347892] [2024-01-27 15:31:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153347892] [2024-01-27 15:31:24,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153347892] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:24,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636108968] [2024-01-27 15:31:24,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:31:24,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:24,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:24,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:25,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:31:25,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:31:25,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:25,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:31:25,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:25,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636108968] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:25,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:31:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381348427] [2024-01-27 15:31:25,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:25,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:31:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:31:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:31:25,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:25,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 614 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:25,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:25,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:25,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:25,286 INFO L124 PetriNetUnfolderBase]: 153/296 cut-off events. [2024-01-27 15:31:25,286 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2024-01-27 15:31:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 296 events. 153/296 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1041 event pairs, 18 based on Foata normal form. 10/299 useless extension candidates. Maximal degree in co-relation 1403. Up to 219 conditions per place. [2024-01-27 15:31:25,288 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 67 selfloop transitions, 18 changer transitions 0/88 dead transitions. [2024-01-27 15:31:25,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 894 flow [2024-01-27 15:31:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:31:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:31:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 70 transitions. [2024-01-27 15:31:25,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-27 15:31:25,289 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 614 flow. Second operand 8 states and 70 transitions. [2024-01-27 15:31:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 894 flow [2024-01-27 15:31:25,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 873 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-27 15:31:25,293 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 681 flow [2024-01-27 15:31:25,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=681, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-01-27 15:31:25,293 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 48 predicate places. [2024-01-27 15:31:25,293 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 681 flow [2024-01-27 15:31:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:25,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:25,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:25,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:31:25,505 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:25,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2020069414, now seen corresponding path program 11 times [2024-01-27 15:31:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:25,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784998038] [2024-01-27 15:31:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:27,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784998038] [2024-01-27 15:31:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784998038] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136545459] [2024-01-27 15:31:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:31:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:27,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:31:27,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:31:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:27,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:31:27,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:27,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:31:27,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:27,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 140 [2024-01-27 15:31:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:27,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:31,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136545459] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:31,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:31,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-01-27 15:31:31,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347581353] [2024-01-27 15:31:31,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:31,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:31:31,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:31,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:31:31,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:31:31,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:31,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 681 flow. Second operand has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:31,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:31,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:31,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:34,802 INFO L124 PetriNetUnfolderBase]: 423/818 cut-off events. [2024-01-27 15:31:34,802 INFO L125 PetriNetUnfolderBase]: For 2075/2075 co-relation queries the response was YES. [2024-01-27 15:31:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4081 conditions, 818 events. 423/818 cut-off events. For 2075/2075 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4069 event pairs, 10 based on Foata normal form. 2/799 useless extension candidates. Maximal degree in co-relation 3413. Up to 282 conditions per place. [2024-01-27 15:31:34,807 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 150 selfloop transitions, 101 changer transitions 36/290 dead transitions. [2024-01-27 15:31:34,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 290 transitions, 2687 flow [2024-01-27 15:31:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-27 15:31:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-27 15:31:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 399 transitions. [2024-01-27 15:31:34,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-01-27 15:31:34,809 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 681 flow. Second operand 41 states and 399 transitions. [2024-01-27 15:31:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 290 transitions, 2687 flow [2024-01-27 15:31:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 290 transitions, 2627 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-01-27 15:31:34,819 INFO L231 Difference]: Finished difference. Result has 123 places, 166 transitions, 2053 flow [2024-01-27 15:31:34,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=2053, PETRI_PLACES=123, PETRI_TRANSITIONS=166} [2024-01-27 15:31:34,819 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2024-01-27 15:31:34,819 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 166 transitions, 2053 flow [2024-01-27 15:31:34,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:34,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:34,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:34,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:35,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:31:35,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:35,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1422304328, now seen corresponding path program 12 times [2024-01-27 15:31:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406724481] [2024-01-27 15:31:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:35,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406724481] [2024-01-27 15:31:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406724481] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:35,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073013423] [2024-01-27 15:31:35,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:31:35,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:35,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:35,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:35,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:31:35,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:31:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:35,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:31:35,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:36,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:36,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 142 [2024-01-27 15:31:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:31:36,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:37,465 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-01-27 15:31:37,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 416 [2024-01-27 15:31:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073013423] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:43,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2024-01-27 15:31:43,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827349289] [2024-01-27 15:31:43,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:31:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:43,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:31:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:31:43,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:43,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 166 transitions, 2053 flow. Second operand has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:43,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:43,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:45,043 INFO L124 PetriNetUnfolderBase]: 716/1281 cut-off events. [2024-01-27 15:31:45,044 INFO L125 PetriNetUnfolderBase]: For 6096/6096 co-relation queries the response was YES. [2024-01-27 15:31:45,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8419 conditions, 1281 events. 716/1281 cut-off events. For 6096/6096 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6596 event pairs, 30 based on Foata normal form. 6/1274 useless extension candidates. Maximal degree in co-relation 8289. Up to 730 conditions per place. [2024-01-27 15:31:45,054 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 159 selfloop transitions, 193 changer transitions 11/366 dead transitions. [2024-01-27 15:31:45,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 366 transitions, 5091 flow [2024-01-27 15:31:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:31:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:31:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 269 transitions. [2024-01-27 15:31:45,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47442680776014107 [2024-01-27 15:31:45,058 INFO L175 Difference]: Start difference. First operand has 123 places, 166 transitions, 2053 flow. Second operand 27 states and 269 transitions. [2024-01-27 15:31:45,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 366 transitions, 5091 flow [2024-01-27 15:31:45,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 366 transitions, 4579 flow, removed 239 selfloop flow, removed 9 redundant places. [2024-01-27 15:31:45,090 INFO L231 Difference]: Finished difference. Result has 145 places, 303 transitions, 4328 flow [2024-01-27 15:31:45,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4328, PETRI_PLACES=145, PETRI_TRANSITIONS=303} [2024-01-27 15:31:45,091 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2024-01-27 15:31:45,091 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 303 transitions, 4328 flow [2024-01-27 15:31:45,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:45,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:45,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:45,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:31:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:45,302 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:45,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash 558811820, now seen corresponding path program 13 times [2024-01-27 15:31:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:45,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504818341] [2024-01-27 15:31:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504818341] [2024-01-27 15:31:47,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504818341] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:47,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155507368] [2024-01-27 15:31:47,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:31:47,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:47,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:31:47,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:31:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:47,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-27 15:31:47,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:47,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:47,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2024-01-27 15:31:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:31:47,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:48,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:31:48,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 966 treesize of output 426 [2024-01-27 15:31:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:31:59,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155507368] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:59,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:59,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-01-27 15:31:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405839197] [2024-01-27 15:31:59,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:59,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:31:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:31:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:31:59,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:59,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 303 transitions, 4328 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:59,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:59,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:02,582 INFO L124 PetriNetUnfolderBase]: 802/1419 cut-off events. [2024-01-27 15:32:02,582 INFO L125 PetriNetUnfolderBase]: For 7585/7585 co-relation queries the response was YES. [2024-01-27 15:32:02,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10011 conditions, 1419 events. 802/1419 cut-off events. For 7585/7585 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7446 event pairs, 44 based on Foata normal form. 4/1414 useless extension candidates. Maximal degree in co-relation 9944. Up to 1037 conditions per place. [2024-01-27 15:32:02,594 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 274 selfloop transitions, 142 changer transitions 24/443 dead transitions. [2024-01-27 15:32:02,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 443 transitions, 6512 flow [2024-01-27 15:32:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:32:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:32:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 355 transitions. [2024-01-27 15:32:02,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568854568854569 [2024-01-27 15:32:02,596 INFO L175 Difference]: Start difference. First operand has 145 places, 303 transitions, 4328 flow. Second operand 37 states and 355 transitions. [2024-01-27 15:32:02,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 443 transitions, 6512 flow [2024-01-27 15:32:02,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 443 transitions, 5666 flow, removed 403 selfloop flow, removed 13 redundant places. [2024-01-27 15:32:02,652 INFO L231 Difference]: Finished difference. Result has 178 places, 355 transitions, 4915 flow [2024-01-27 15:32:02,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3694, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4915, PETRI_PLACES=178, PETRI_TRANSITIONS=355} [2024-01-27 15:32:02,653 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 156 predicate places. [2024-01-27 15:32:02,653 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 355 transitions, 4915 flow [2024-01-27 15:32:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:02,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:02,653 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:02,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:02,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:32:02,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:02,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -314928860, now seen corresponding path program 14 times [2024-01-27 15:32:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:02,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228594536] [2024-01-27 15:32:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:02,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:04,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228594536] [2024-01-27 15:32:04,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228594536] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770881499] [2024-01-27 15:32:04,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:32:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:04,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:32:04,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:32:04,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:32:04,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:04,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:32:04,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:04,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:32:05,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:05,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 158 [2024-01-27 15:32:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:05,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:12,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 289 [2024-01-27 15:32:12,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:12,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 549 treesize of output 517 [2024-01-27 15:32:15,295 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-01-27 15:32:32,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 356 [2024-01-27 15:32:32,273 INFO L349 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2024-01-27 15:32:32,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 699 treesize of output 1 [2024-01-27 15:32:32,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 666 treesize of output 592 [2024-01-27 15:32:32,320 INFO L349 Elim1Store]: treesize reduction 352, result has 0.3 percent of original size [2024-01-27 15:32:32,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1147 treesize of output 1 [2024-01-27 15:32:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:32,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770881499] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:32,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:32,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-01-27 15:32:32,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335464280] [2024-01-27 15:32:32,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:32,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:32:32,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:32:32,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:32:32,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:32:32,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 355 transitions, 4915 flow. Second operand has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:32,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:32:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:36,721 INFO L124 PetriNetUnfolderBase]: 815/1445 cut-off events. [2024-01-27 15:32:36,722 INFO L125 PetriNetUnfolderBase]: For 7398/7398 co-relation queries the response was YES. [2024-01-27 15:32:36,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 1445 events. 815/1445 cut-off events. For 7398/7398 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7577 event pairs, 40 based on Foata normal form. 3/1441 useless extension candidates. Maximal degree in co-relation 9576. Up to 1183 conditions per place. [2024-01-27 15:32:36,738 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 313 selfloop transitions, 111 changer transitions 8/435 dead transitions. [2024-01-27 15:32:36,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 435 transitions, 6232 flow [2024-01-27 15:32:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:32:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:32:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 255 transitions. [2024-01-27 15:32:36,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-01-27 15:32:36,746 INFO L175 Difference]: Start difference. First operand has 178 places, 355 transitions, 4915 flow. Second operand 27 states and 255 transitions. [2024-01-27 15:32:36,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 435 transitions, 6232 flow [2024-01-27 15:32:36,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 435 transitions, 5858 flow, removed 150 selfloop flow, removed 19 redundant places. [2024-01-27 15:32:36,807 INFO L231 Difference]: Finished difference. Result has 190 places, 377 transitions, 5138 flow [2024-01-27 15:32:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5138, PETRI_PLACES=190, PETRI_TRANSITIONS=377} [2024-01-27 15:32:36,808 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2024-01-27 15:32:36,808 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 377 transitions, 5138 flow [2024-01-27 15:32:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:36,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:36,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:37,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:37,020 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:37,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 848865960, now seen corresponding path program 15 times [2024-01-27 15:32:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504142537] [2024-01-27 15:32:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:38,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504142537] [2024-01-27 15:32:38,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504142537] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:38,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640680379] [2024-01-27 15:32:38,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:32:38,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:38,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:32:38,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:32:38,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:32:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:38,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:32:38,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:38,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:32:39,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:39,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 144 [2024-01-27 15:32:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:39,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:32:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640680379] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:44,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-01-27 15:32:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7373601] [2024-01-27 15:32:44,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:44,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:32:44,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:32:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:32:44,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:32:44,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 377 transitions, 5138 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:44,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:44,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:32:44,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:52,076 INFO L124 PetriNetUnfolderBase]: 975/1805 cut-off events. [2024-01-27 15:32:52,076 INFO L125 PetriNetUnfolderBase]: For 8964/8964 co-relation queries the response was YES. [2024-01-27 15:32:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 1805 events. 975/1805 cut-off events. For 8964/8964 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10480 event pairs, 6 based on Foata normal form. 3/1797 useless extension candidates. Maximal degree in co-relation 11858. Up to 749 conditions per place. [2024-01-27 15:32:52,093 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 314 selfloop transitions, 244 changer transitions 8/569 dead transitions. [2024-01-27 15:32:52,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 569 transitions, 7975 flow [2024-01-27 15:32:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:32:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:32:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 431 transitions. [2024-01-27 15:32:52,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46645021645021645 [2024-01-27 15:32:52,094 INFO L175 Difference]: Start difference. First operand has 190 places, 377 transitions, 5138 flow. Second operand 44 states and 431 transitions. [2024-01-27 15:32:52,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 569 transitions, 7975 flow [2024-01-27 15:32:52,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 569 transitions, 7736 flow, removed 87 selfloop flow, removed 17 redundant places. [2024-01-27 15:32:52,179 INFO L231 Difference]: Finished difference. Result has 235 places, 469 transitions, 7146 flow [2024-01-27 15:32:52,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7146, PETRI_PLACES=235, PETRI_TRANSITIONS=469} [2024-01-27 15:32:52,180 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 213 predicate places. [2024-01-27 15:32:52,180 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 469 transitions, 7146 flow [2024-01-27 15:32:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:52,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:52,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:52,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:52,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:52,386 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:52,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:52,387 INFO L85 PathProgramCache]: Analyzing trace with hash -794827352, now seen corresponding path program 16 times [2024-01-27 15:32:52,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:52,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661756739] [2024-01-27 15:32:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:53,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:53,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661756739] [2024-01-27 15:32:53,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661756739] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:53,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81028664] [2024-01-27 15:32:53,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:32:53,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:53,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:53,503 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:32:53,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:32:53,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:32:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:53,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:32:53,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:53,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:32:54,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:32:54,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2024-01-27 15:32:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:32:54,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:32:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81028664] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:58,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:58,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-01-27 15:32:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712311270] [2024-01-27 15:32:58,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:32:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:32:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:32:58,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:32:58,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 469 transitions, 7146 flow. Second operand has 25 states, 25 states have (on average 6.92) internal successors, (173), 25 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:58,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:58,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:32:58,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:00,065 INFO L124 PetriNetUnfolderBase]: 1004/1876 cut-off events. [2024-01-27 15:33:00,065 INFO L125 PetriNetUnfolderBase]: For 12215/12215 co-relation queries the response was YES. [2024-01-27 15:33:00,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13335 conditions, 1876 events. 1004/1876 cut-off events. For 12215/12215 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11113 event pairs, 78 based on Foata normal form. 4/1879 useless extension candidates. Maximal degree in co-relation 13234. Up to 1670 conditions per place. [2024-01-27 15:33:00,092 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 449 selfloop transitions, 52 changer transitions 30/534 dead transitions. [2024-01-27 15:33:00,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 534 transitions, 8559 flow [2024-01-27 15:33:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:33:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:33:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 235 transitions. [2024-01-27 15:33:00,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 15:33:00,094 INFO L175 Difference]: Start difference. First operand has 235 places, 469 transitions, 7146 flow. Second operand 25 states and 235 transitions. [2024-01-27 15:33:00,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 534 transitions, 8559 flow [2024-01-27 15:33:00,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 534 transitions, 8155 flow, removed 173 selfloop flow, removed 16 redundant places. [2024-01-27 15:33:00,243 INFO L231 Difference]: Finished difference. Result has 249 places, 474 transitions, 6973 flow [2024-01-27 15:33:00,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6973, PETRI_PLACES=249, PETRI_TRANSITIONS=474} [2024-01-27 15:33:00,243 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2024-01-27 15:33:00,243 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 474 transitions, 6973 flow [2024-01-27 15:33:00,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.92) internal successors, (173), 25 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:00,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:00,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:00,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:00,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:00,448 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:00,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1196399424, now seen corresponding path program 17 times [2024-01-27 15:33:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618577399] [2024-01-27 15:33:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:01,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618577399] [2024-01-27 15:33:01,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618577399] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:01,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46057542] [2024-01-27 15:33:01,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:33:01,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:01,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:01,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:33:01,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:33:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:01,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:33:01,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:01,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:33:01,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:01,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 161 [2024-01-27 15:33:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:01,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:33:06,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46057542] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:06,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:06,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-01-27 15:33:06,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130061172] [2024-01-27 15:33:06,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:06,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:33:06,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:33:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:33:06,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:06,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 474 transitions, 6973 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:06,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:06,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:06,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:08,155 INFO L124 PetriNetUnfolderBase]: 993/1848 cut-off events. [2024-01-27 15:33:08,155 INFO L125 PetriNetUnfolderBase]: For 11369/11369 co-relation queries the response was YES. [2024-01-27 15:33:08,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12947 conditions, 1848 events. 993/1848 cut-off events. For 11369/11369 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 10884 event pairs, 78 based on Foata normal form. 3/1850 useless extension candidates. Maximal degree in co-relation 12841. Up to 1704 conditions per place. [2024-01-27 15:33:08,171 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 450 selfloop transitions, 45 changer transitions 17/515 dead transitions. [2024-01-27 15:33:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 515 transitions, 8236 flow [2024-01-27 15:33:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:33:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:33:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 177 transitions. [2024-01-27 15:33:08,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44360902255639095 [2024-01-27 15:33:08,172 INFO L175 Difference]: Start difference. First operand has 249 places, 474 transitions, 6973 flow. Second operand 19 states and 177 transitions. [2024-01-27 15:33:08,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 515 transitions, 8236 flow [2024-01-27 15:33:08,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 515 transitions, 8042 flow, removed 48 selfloop flow, removed 20 redundant places. [2024-01-27 15:33:08,303 INFO L231 Difference]: Finished difference. Result has 246 places, 477 transitions, 6942 flow [2024-01-27 15:33:08,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6942, PETRI_PLACES=246, PETRI_TRANSITIONS=477} [2024-01-27 15:33:08,304 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 224 predicate places. [2024-01-27 15:33:08,304 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 477 transitions, 6942 flow [2024-01-27 15:33:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:08,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:08,304 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:08,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:08,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:08,505 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:08,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1545929432, now seen corresponding path program 18 times [2024-01-27 15:33:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:08,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174781271] [2024-01-27 15:33:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:09,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174781271] [2024-01-27 15:33:09,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174781271] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:09,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834765944] [2024-01-27 15:33:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:33:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:09,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:09,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:33:10,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:33:10,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:10,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:33:10,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:10,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:33:10,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:10,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 145 [2024-01-27 15:33:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:10,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:33:15,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834765944] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:15,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:15,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-01-27 15:33:15,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464514317] [2024-01-27 15:33:15,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:15,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:33:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:33:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:33:15,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:15,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 477 transitions, 6942 flow. Second operand has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:15,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:15,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:15,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:16,295 INFO L124 PetriNetUnfolderBase]: 1018/1866 cut-off events. [2024-01-27 15:33:16,295 INFO L125 PetriNetUnfolderBase]: For 11597/11597 co-relation queries the response was YES. [2024-01-27 15:33:16,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13071 conditions, 1866 events. 1018/1866 cut-off events. For 11597/11597 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10825 event pairs, 78 based on Foata normal form. 3/1868 useless extension candidates. Maximal degree in co-relation 12965. Up to 1705 conditions per place. [2024-01-27 15:33:16,314 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 452 selfloop transitions, 74 changer transitions 8/537 dead transitions. [2024-01-27 15:33:16,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 537 transitions, 8509 flow [2024-01-27 15:33:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:33:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:33:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 208 transitions. [2024-01-27 15:33:16,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306418219461698 [2024-01-27 15:33:16,329 INFO L175 Difference]: Start difference. First operand has 246 places, 477 transitions, 6942 flow. Second operand 23 states and 208 transitions. [2024-01-27 15:33:16,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 537 transitions, 8509 flow [2024-01-27 15:33:16,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 537 transitions, 8360 flow, removed 30 selfloop flow, removed 18 redundant places. [2024-01-27 15:33:16,482 INFO L231 Difference]: Finished difference. Result has 254 places, 500 transitions, 7377 flow [2024-01-27 15:33:16,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7377, PETRI_PLACES=254, PETRI_TRANSITIONS=500} [2024-01-27 15:33:16,482 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 232 predicate places. [2024-01-27 15:33:16,483 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 500 transitions, 7377 flow [2024-01-27 15:33:16,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.72) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:16,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:16,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:16,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:16,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:33:16,694 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:16,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1009424188, now seen corresponding path program 19 times [2024-01-27 15:33:16,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:16,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579846913] [2024-01-27 15:33:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579846913] [2024-01-27 15:33:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579846913] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032348606] [2024-01-27 15:33:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:33:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:17,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:17,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:33:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:17,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:33:17,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:17,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:17,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 164 [2024-01-27 15:33:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:33:18,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:18,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:18,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 959 treesize of output 445 [2024-01-27 15:33:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:33:24,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032348606] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:24,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:24,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 23 [2024-01-27 15:33:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178999169] [2024-01-27 15:33:24,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:33:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:33:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:33:24,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:24,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 500 transitions, 7377 flow. Second operand has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:24,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:24,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:24,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:25,881 INFO L124 PetriNetUnfolderBase]: 1032/1885 cut-off events. [2024-01-27 15:33:25,881 INFO L125 PetriNetUnfolderBase]: For 12191/12191 co-relation queries the response was YES. [2024-01-27 15:33:25,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13338 conditions, 1885 events. 1032/1885 cut-off events. For 12191/12191 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 10863 event pairs, 72 based on Foata normal form. 3/1887 useless extension candidates. Maximal degree in co-relation 13229. Up to 1711 conditions per place. [2024-01-27 15:33:25,904 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 460 selfloop transitions, 74 changer transitions 8/545 dead transitions. [2024-01-27 15:33:25,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 545 transitions, 8635 flow [2024-01-27 15:33:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:33:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:33:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 224 transitions. [2024-01-27 15:33:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:33:25,909 INFO L175 Difference]: Start difference. First operand has 254 places, 500 transitions, 7377 flow. Second operand 24 states and 224 transitions. [2024-01-27 15:33:25,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 545 transitions, 8635 flow [2024-01-27 15:33:26,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 545 transitions, 8477 flow, removed 47 selfloop flow, removed 16 redundant places. [2024-01-27 15:33:26,085 INFO L231 Difference]: Finished difference. Result has 263 places, 502 transitions, 7419 flow [2024-01-27 15:33:26,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7419, PETRI_PLACES=263, PETRI_TRANSITIONS=502} [2024-01-27 15:33:26,085 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 241 predicate places. [2024-01-27 15:33:26,086 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 502 transitions, 7419 flow [2024-01-27 15:33:26,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:26,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:26,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:26,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:26,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:33:26,287 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:26,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:26,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1004548448, now seen corresponding path program 20 times [2024-01-27 15:33:26,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:26,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312329703] [2024-01-27 15:33:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:26,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312329703] [2024-01-27 15:33:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312329703] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252275155] [2024-01-27 15:33:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:33:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:27,363 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:27,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:33:27,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:33:27,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:27,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:33:27,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:27,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:27,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 142 [2024-01-27 15:33:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:28,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:29,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:29,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 940 treesize of output 442 [2024-01-27 15:33:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:33:36,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252275155] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:36,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:36,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-01-27 15:33:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625674025] [2024-01-27 15:33:36,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:33:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:33:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:33:36,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:36,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 502 transitions, 7419 flow. Second operand has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:36,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:36,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:36,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:38,050 INFO L124 PetriNetUnfolderBase]: 1127/2027 cut-off events. [2024-01-27 15:33:38,050 INFO L125 PetriNetUnfolderBase]: For 13708/13708 co-relation queries the response was YES. [2024-01-27 15:33:38,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14623 conditions, 2027 events. 1127/2027 cut-off events. For 13708/13708 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 11698 event pairs, 76 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 14511. Up to 1807 conditions per place. [2024-01-27 15:33:38,069 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 468 selfloop transitions, 123 changer transitions 8/602 dead transitions. [2024-01-27 15:33:38,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 602 transitions, 9792 flow [2024-01-27 15:33:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:33:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:33:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 240 transitions. [2024-01-27 15:33:38,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-01-27 15:33:38,070 INFO L175 Difference]: Start difference. First operand has 263 places, 502 transitions, 7419 flow. Second operand 27 states and 240 transitions. [2024-01-27 15:33:38,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 602 transitions, 9792 flow [2024-01-27 15:33:38,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 602 transitions, 9689 flow, removed 4 selfloop flow, removed 20 redundant places. [2024-01-27 15:33:38,239 INFO L231 Difference]: Finished difference. Result has 278 places, 567 transitions, 8787 flow [2024-01-27 15:33:38,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8787, PETRI_PLACES=278, PETRI_TRANSITIONS=567} [2024-01-27 15:33:38,240 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 256 predicate places. [2024-01-27 15:33:38,240 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 567 transitions, 8787 flow [2024-01-27 15:33:38,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.666666666666667) internal successors, (180), 27 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:38,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:38,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:38,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:33:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:38,441 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:38,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1128034004, now seen corresponding path program 21 times [2024-01-27 15:33:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:38,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791029982] [2024-01-27 15:33:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:40,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791029982] [2024-01-27 15:33:40,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791029982] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:40,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790042354] [2024-01-27 15:33:40,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:33:40,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:40,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:40,842 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:40,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:33:40,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:33:40,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:40,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:33:40,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:40,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:33:41,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:41,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 315 treesize of output 259 [2024-01-27 15:33:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:43,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:50,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 171 [2024-01-27 15:33:50,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:50,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 282 [2024-01-27 15:33:52,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 86 [2024-01-27 15:33:52,242 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-01-27 15:33:52,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 1 [2024-01-27 15:33:52,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 168 [2024-01-27 15:33:52,251 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-01-27 15:33:52,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 360 treesize of output 1 [2024-01-27 15:33:52,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2024-01-27 15:33:52,262 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-01-27 15:33:52,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 422 treesize of output 1 [2024-01-27 15:33:52,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2024-01-27 15:33:52,269 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-01-27 15:33:52,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 1 [2024-01-27 15:33:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790042354] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:52,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-01-27 15:33:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376381478] [2024-01-27 15:33:52,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:52,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:33:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:33:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:33:52,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:52,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 567 transitions, 8787 flow. Second operand has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:52,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:52,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:55,811 INFO L124 PetriNetUnfolderBase]: 1142/2070 cut-off events. [2024-01-27 15:33:55,811 INFO L125 PetriNetUnfolderBase]: For 14912/14912 co-relation queries the response was YES. [2024-01-27 15:33:55,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 2070 events. 1142/2070 cut-off events. For 14912/14912 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 12198 event pairs, 76 based on Foata normal form. 4/2073 useless extension candidates. Maximal degree in co-relation 15370. Up to 1870 conditions per place. [2024-01-27 15:33:55,833 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 522 selfloop transitions, 81 changer transitions 12/618 dead transitions. [2024-01-27 15:33:55,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 618 transitions, 10369 flow [2024-01-27 15:33:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 15:33:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 15:33:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 239 transitions. [2024-01-27 15:33:55,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064625850340136 [2024-01-27 15:33:55,834 INFO L175 Difference]: Start difference. First operand has 278 places, 567 transitions, 8787 flow. Second operand 28 states and 239 transitions. [2024-01-27 15:33:55,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 618 transitions, 10369 flow [2024-01-27 15:33:56,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 618 transitions, 9951 flow, removed 177 selfloop flow, removed 14 redundant places. [2024-01-27 15:33:56,036 INFO L231 Difference]: Finished difference. Result has 296 places, 578 transitions, 8763 flow [2024-01-27 15:33:56,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8373, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8763, PETRI_PLACES=296, PETRI_TRANSITIONS=578} [2024-01-27 15:33:56,037 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 274 predicate places. [2024-01-27 15:33:56,037 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 578 transitions, 8763 flow [2024-01-27 15:33:56,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:56,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:56,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:56,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-27 15:33:56,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:56,249 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:56,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1784799768, now seen corresponding path program 22 times [2024-01-27 15:33:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194268420] [2024-01-27 15:33:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:33:56,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194268420] [2024-01-27 15:33:56,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194268420] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754797286] [2024-01-27 15:33:56,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:33:56,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:56,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:56,940 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:33:56,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:33:57,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:33:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:57,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:33:57,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:57,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:57,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 141 [2024-01-27 15:33:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:33:57,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:58,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:33:58,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 947 treesize of output 423 [2024-01-27 15:34:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:05,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754797286] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:05,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:05,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2024-01-27 15:34:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141268927] [2024-01-27 15:34:05,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:05,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:34:05,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:34:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:34:05,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:34:05,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 578 transitions, 8763 flow. Second operand has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:05,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:05,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:34:05,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:07,070 INFO L124 PetriNetUnfolderBase]: 1155/2087 cut-off events. [2024-01-27 15:34:07,070 INFO L125 PetriNetUnfolderBase]: For 15476/15476 co-relation queries the response was YES. [2024-01-27 15:34:07,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15572 conditions, 2087 events. 1155/2087 cut-off events. For 15476/15476 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 12253 event pairs, 76 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 15444. Up to 1947 conditions per place. [2024-01-27 15:34:07,099 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 556 selfloop transitions, 50 changer transitions 7/616 dead transitions. [2024-01-27 15:34:07,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 616 transitions, 10272 flow [2024-01-27 15:34:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:34:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:34:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 198 transitions. [2024-01-27 15:34:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40993788819875776 [2024-01-27 15:34:07,100 INFO L175 Difference]: Start difference. First operand has 296 places, 578 transitions, 8763 flow. Second operand 23 states and 198 transitions. [2024-01-27 15:34:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 616 transitions, 10272 flow [2024-01-27 15:34:07,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 616 transitions, 10111 flow, removed 38 selfloop flow, removed 19 redundant places. [2024-01-27 15:34:07,330 INFO L231 Difference]: Finished difference. Result has 302 places, 584 transitions, 8869 flow [2024-01-27 15:34:07,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8602, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8869, PETRI_PLACES=302, PETRI_TRANSITIONS=584} [2024-01-27 15:34:07,331 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 280 predicate places. [2024-01-27 15:34:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 584 transitions, 8869 flow [2024-01-27 15:34:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:07,332 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:07,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:07,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:34:07,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:07,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1089547432, now seen corresponding path program 23 times [2024-01-27 15:34:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819520951] [2024-01-27 15:34:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:08,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819520951] [2024-01-27 15:34:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819520951] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193181837] [2024-01-27 15:34:08,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:34:08,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:08,701 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:08,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:34:08,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:34:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:08,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:34:08,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:09,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:09,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 145 [2024-01-27 15:34:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:09,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:10,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:10,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 947 treesize of output 423 [2024-01-27 15:34:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:20,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193181837] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:20,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:20,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 23 [2024-01-27 15:34:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334548173] [2024-01-27 15:34:20,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:34:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:34:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:34:20,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:34:20,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 584 transitions, 8869 flow. Second operand has 23 states, 23 states have (on average 6.826086956521739) internal successors, (157), 23 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:20,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:20,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:34:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:21,917 INFO L124 PetriNetUnfolderBase]: 1208/2162 cut-off events. [2024-01-27 15:34:21,917 INFO L125 PetriNetUnfolderBase]: For 17586/17586 co-relation queries the response was YES. [2024-01-27 15:34:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16315 conditions, 2162 events. 1208/2162 cut-off events. For 17586/17586 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 12661 event pairs, 76 based on Foata normal form. 2/2163 useless extension candidates. Maximal degree in co-relation 16184. Up to 1985 conditions per place. [2024-01-27 15:34:21,936 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 550 selfloop transitions, 90 changer transitions 7/650 dead transitions. [2024-01-27 15:34:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 650 transitions, 10951 flow [2024-01-27 15:34:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:34:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:34:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 228 transitions. [2024-01-27 15:34:21,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342857142857143 [2024-01-27 15:34:21,937 INFO L175 Difference]: Start difference. First operand has 302 places, 584 transitions, 8869 flow. Second operand 25 states and 228 transitions. [2024-01-27 15:34:21,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 650 transitions, 10951 flow [2024-01-27 15:34:22,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 650 transitions, 10783 flow, removed 52 selfloop flow, removed 16 redundant places. [2024-01-27 15:34:22,170 INFO L231 Difference]: Finished difference. Result has 317 places, 616 transitions, 9586 flow [2024-01-27 15:34:22,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8701, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9586, PETRI_PLACES=317, PETRI_TRANSITIONS=616} [2024-01-27 15:34:22,171 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 295 predicate places. [2024-01-27 15:34:22,171 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 616 transitions, 9586 flow [2024-01-27 15:34:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.826086956521739) internal successors, (157), 23 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:22,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:22,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:22,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:34:22,379 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash -330570846, now seen corresponding path program 24 times [2024-01-27 15:34:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667776608] [2024-01-27 15:34:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667776608] [2024-01-27 15:34:22,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667776608] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:22,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882939328] [2024-01-27 15:34:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:34:22,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:22,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:22,938 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:22,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:34:23,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:34:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:23,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:34:23,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:23,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:34:23,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:23,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 145 [2024-01-27 15:34:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:23,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882939328] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:28,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:28,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-01-27 15:34:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379785246] [2024-01-27 15:34:28,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:34:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:34:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:34:28,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:34:28,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 616 transitions, 9586 flow. Second operand has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:28,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:28,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:34:28,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:37,191 INFO L124 PetriNetUnfolderBase]: 1319/2336 cut-off events. [2024-01-27 15:34:37,191 INFO L125 PetriNetUnfolderBase]: For 21230/21230 co-relation queries the response was YES. [2024-01-27 15:34:37,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18052 conditions, 2336 events. 1319/2336 cut-off events. For 21230/21230 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 13874 event pairs, 0 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 17915. Up to 1472 conditions per place. [2024-01-27 15:34:37,219 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 454 selfloop transitions, 274 changer transitions 12/743 dead transitions. [2024-01-27 15:34:37,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 743 transitions, 12442 flow [2024-01-27 15:34:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:34:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:34:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 339 transitions. [2024-01-27 15:34:37,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46122448979591835 [2024-01-27 15:34:37,222 INFO L175 Difference]: Start difference. First operand has 317 places, 616 transitions, 9586 flow. Second operand 35 states and 339 transitions. [2024-01-27 15:34:37,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 743 transitions, 12442 flow [2024-01-27 15:34:37,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 743 transitions, 12021 flow, removed 169 selfloop flow, removed 18 redundant places. [2024-01-27 15:34:37,540 INFO L231 Difference]: Finished difference. Result has 337 places, 669 transitions, 10929 flow [2024-01-27 15:34:37,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9192, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10929, PETRI_PLACES=337, PETRI_TRANSITIONS=669} [2024-01-27 15:34:37,541 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 315 predicate places. [2024-01-27 15:34:37,541 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 669 transitions, 10929 flow [2024-01-27 15:34:37,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.7407407407407405) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:37,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:37,542 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:37,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:37,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:34:37,746 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:37,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash 781624104, now seen corresponding path program 25 times [2024-01-27 15:34:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:37,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944532200] [2024-01-27 15:34:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:38,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944532200] [2024-01-27 15:34:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944532200] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982342086] [2024-01-27 15:34:38,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:34:38,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:38,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:38,419 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 15:34:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:38,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:34:38,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:38,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:38,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 145 [2024-01-27 15:34:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:39,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:39,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:39,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 947 treesize of output 423 [2024-01-27 15:34:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:34:48,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982342086] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:48,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:48,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 23 [2024-01-27 15:34:48,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849595711] [2024-01-27 15:34:48,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:48,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:34:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:34:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:34:48,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:34:48,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 669 transitions, 10929 flow. Second operand has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:48,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:48,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:34:48,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:49,365 INFO L124 PetriNetUnfolderBase]: 1319/2343 cut-off events. [2024-01-27 15:34:49,366 INFO L125 PetriNetUnfolderBase]: For 24631/24631 co-relation queries the response was YES. [2024-01-27 15:34:49,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18721 conditions, 2343 events. 1319/2343 cut-off events. For 24631/24631 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 13836 event pairs, 76 based on Foata normal form. 2/2342 useless extension candidates. Maximal degree in co-relation 18580. Up to 2181 conditions per place. [2024-01-27 15:34:49,394 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 621 selfloop transitions, 78 changer transitions 7/709 dead transitions. [2024-01-27 15:34:49,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 709 transitions, 12609 flow [2024-01-27 15:34:49,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:34:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:34:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 215 transitions. [2024-01-27 15:34:49,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451345755693582 [2024-01-27 15:34:49,395 INFO L175 Difference]: Start difference. First operand has 337 places, 669 transitions, 10929 flow. Second operand 23 states and 215 transitions. [2024-01-27 15:34:49,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 709 transitions, 12609 flow [2024-01-27 15:34:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 709 transitions, 12077 flow, removed 240 selfloop flow, removed 15 redundant places. [2024-01-27 15:34:49,709 INFO L231 Difference]: Finished difference. Result has 346 places, 673 transitions, 10685 flow [2024-01-27 15:34:49,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10397, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10685, PETRI_PLACES=346, PETRI_TRANSITIONS=673} [2024-01-27 15:34:49,710 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 324 predicate places. [2024-01-27 15:34:49,710 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 673 transitions, 10685 flow [2024-01-27 15:34:49,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.913043478260869) internal successors, (159), 23 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:49,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:49,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:49,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:49,917 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:49,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash -18810924, now seen corresponding path program 26 times [2024-01-27 15:34:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:49,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863884440] [2024-01-27 15:34:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:49,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:51,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:51,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863884440] [2024-01-27 15:34:51,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863884440] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:51,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149449965] [2024-01-27 15:34:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:34:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:51,277 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:34:51,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 15:34:51,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:34:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:34:51,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:34:51,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:51,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:51,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 142 [2024-01-27 15:34:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:34:52,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:53,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:34:53,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 940 treesize of output 442 [2024-01-27 15:35:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:00,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149449965] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:00,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:00,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-01-27 15:35:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310479995] [2024-01-27 15:35:00,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:35:00,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:35:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:35:00,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:00,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 673 transitions, 10685 flow. Second operand has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:00,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:00,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:00,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:02,568 INFO L124 PetriNetUnfolderBase]: 1334/2378 cut-off events. [2024-01-27 15:35:02,568 INFO L125 PetriNetUnfolderBase]: For 24047/24047 co-relation queries the response was YES. [2024-01-27 15:35:02,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18683 conditions, 2378 events. 1334/2378 cut-off events. For 24047/24047 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 14274 event pairs, 72 based on Foata normal form. 2/2377 useless extension candidates. Maximal degree in co-relation 18541. Up to 2168 conditions per place. [2024-01-27 15:35:02,598 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 601 selfloop transitions, 110 changer transitions 8/722 dead transitions. [2024-01-27 15:35:02,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 722 transitions, 12452 flow [2024-01-27 15:35:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:35:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:35:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 259 transitions. [2024-01-27 15:35:02,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2024-01-27 15:35:02,599 INFO L175 Difference]: Start difference. First operand has 346 places, 673 transitions, 10685 flow. Second operand 29 states and 259 transitions. [2024-01-27 15:35:02,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 722 transitions, 12452 flow [2024-01-27 15:35:02,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 722 transitions, 12283 flow, removed 37 selfloop flow, removed 19 redundant places. [2024-01-27 15:35:02,941 INFO L231 Difference]: Finished difference. Result has 360 places, 679 transitions, 10904 flow [2024-01-27 15:35:02,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10904, PETRI_PLACES=360, PETRI_TRANSITIONS=679} [2024-01-27 15:35:02,942 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 338 predicate places. [2024-01-27 15:35:02,942 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 679 transitions, 10904 flow [2024-01-27 15:35:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:02,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:02,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:02,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-01-27 15:35:03,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:03,145 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:03,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:03,145 INFO L85 PathProgramCache]: Analyzing trace with hash -504535024, now seen corresponding path program 27 times [2024-01-27 15:35:03,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:03,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319341389] [2024-01-27 15:35:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:03,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319341389] [2024-01-27 15:35:04,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319341389] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:04,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094644246] [2024-01-27 15:35:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:04,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:04,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:04,098 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:04,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 15:35:04,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:35:04,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:04,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:35:04,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:04,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:35:05,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:05,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 335 treesize of output 267 [2024-01-27 15:35:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:06,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:13,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 168 [2024-01-27 15:35:13,841 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-01-27 15:35:13,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 360 treesize of output 285 [2024-01-27 15:35:14,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2024-01-27 15:35:14,855 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-01-27 15:35:14,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 1 [2024-01-27 15:35:14,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 171 [2024-01-27 15:35:14,864 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-01-27 15:35:14,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 1 [2024-01-27 15:35:14,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 367 [2024-01-27 15:35:14,879 INFO L349 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2024-01-27 15:35:14,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 717 treesize of output 1 [2024-01-27 15:35:14,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 86 [2024-01-27 15:35:14,887 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-01-27 15:35:14,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 1 [2024-01-27 15:35:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094644246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:14,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-01-27 15:35:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335006441] [2024-01-27 15:35:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:35:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:35:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:35:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:14,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 679 transitions, 10904 flow. Second operand has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:14,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:14,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:18,611 INFO L124 PetriNetUnfolderBase]: 1325/2385 cut-off events. [2024-01-27 15:35:18,611 INFO L125 PetriNetUnfolderBase]: For 23889/23889 co-relation queries the response was YES. [2024-01-27 15:35:18,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18775 conditions, 2385 events. 1325/2385 cut-off events. For 23889/23889 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 14491 event pairs, 76 based on Foata normal form. 4/2386 useless extension candidates. Maximal degree in co-relation 18628. Up to 2184 conditions per place. [2024-01-27 15:35:18,640 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 619 selfloop transitions, 85 changer transitions 12/719 dead transitions. [2024-01-27 15:35:18,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 719 transitions, 12588 flow [2024-01-27 15:35:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:35:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:35:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 231 transitions. [2024-01-27 15:35:18,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-01-27 15:35:18,642 INFO L175 Difference]: Start difference. First operand has 360 places, 679 transitions, 10904 flow. Second operand 27 states and 231 transitions. [2024-01-27 15:35:18,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 719 transitions, 12588 flow [2024-01-27 15:35:18,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 719 transitions, 12407 flow, removed 38 selfloop flow, removed 20 redundant places. [2024-01-27 15:35:18,973 INFO L231 Difference]: Finished difference. Result has 369 places, 680 transitions, 10950 flow [2024-01-27 15:35:18,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10950, PETRI_PLACES=369, PETRI_TRANSITIONS=680} [2024-01-27 15:35:18,974 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 347 predicate places. [2024-01-27 15:35:18,974 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 680 transitions, 10950 flow [2024-01-27 15:35:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.533333333333333) internal successors, (196), 30 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:18,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:18,975 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:18,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-27 15:35:19,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:19,175 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:19,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -546101278, now seen corresponding path program 28 times [2024-01-27 15:35:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470720519] [2024-01-27 15:35:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:19,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:20,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:20,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470720519] [2024-01-27 15:35:20,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470720519] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:20,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616846696] [2024-01-27 15:35:20,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:35:20,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:20,294 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:20,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 15:35:20,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:35:20,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:20,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:35:20,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:20,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:35:20,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:20,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2024-01-27 15:35:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:21,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616846696] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:26,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-01-27 15:35:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772916867] [2024-01-27 15:35:26,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:35:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:35:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:35:26,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:26,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 680 transitions, 10950 flow. Second operand has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:26,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:26,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:26,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:27,918 INFO L124 PetriNetUnfolderBase]: 1346/2416 cut-off events. [2024-01-27 15:35:27,918 INFO L125 PetriNetUnfolderBase]: For 23437/23437 co-relation queries the response was YES. [2024-01-27 15:35:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19143 conditions, 2416 events. 1346/2416 cut-off events. For 23437/23437 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 14672 event pairs, 76 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 18992. Up to 2226 conditions per place. [2024-01-27 15:35:27,944 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 643 selfloop transitions, 71 changer transitions 12/729 dead transitions. [2024-01-27 15:35:27,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 729 transitions, 12648 flow [2024-01-27 15:35:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:35:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:35:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 243 transitions. [2024-01-27 15:35:27,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2024-01-27 15:35:27,945 INFO L175 Difference]: Start difference. First operand has 369 places, 680 transitions, 10950 flow. Second operand 26 states and 243 transitions. [2024-01-27 15:35:27,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 729 transitions, 12648 flow [2024-01-27 15:35:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 729 transitions, 12479 flow, removed 30 selfloop flow, removed 22 redundant places. [2024-01-27 15:35:28,258 INFO L231 Difference]: Finished difference. Result has 374 places, 680 transitions, 10990 flow [2024-01-27 15:35:28,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10781, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10990, PETRI_PLACES=374, PETRI_TRANSITIONS=680} [2024-01-27 15:35:28,259 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 352 predicate places. [2024-01-27 15:35:28,259 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 680 transitions, 10990 flow [2024-01-27 15:35:28,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 25 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:28,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:28,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:28,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-27 15:35:28,460 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:28,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 330719084, now seen corresponding path program 29 times [2024-01-27 15:35:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237607536] [2024-01-27 15:35:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:28,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:29,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237607536] [2024-01-27 15:35:29,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237607536] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:29,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445380746] [2024-01-27 15:35:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:35:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:29,328 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:29,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 15:35:29,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:35:29,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:29,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:35:29,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:29,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:35:29,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:29,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 145 [2024-01-27 15:35:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:29,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445380746] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:34,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:34,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2024-01-27 15:35:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115553387] [2024-01-27 15:35:34,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:35:34,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:35:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:35:34,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:34,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 680 transitions, 10990 flow. Second operand has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:34,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:34,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:34,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:36,024 INFO L124 PetriNetUnfolderBase]: 1348/2414 cut-off events. [2024-01-27 15:35:36,025 INFO L125 PetriNetUnfolderBase]: For 24969/24969 co-relation queries the response was YES. [2024-01-27 15:35:36,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19271 conditions, 2414 events. 1348/2414 cut-off events. For 24969/24969 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 14493 event pairs, 80 based on Foata normal form. 2/2413 useless extension candidates. Maximal degree in co-relation 19118. Up to 2292 conditions per place. [2024-01-27 15:35:36,054 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 654 selfloop transitions, 56 changer transitions 7/720 dead transitions. [2024-01-27 15:35:36,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 720 transitions, 12891 flow [2024-01-27 15:35:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:35:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:35:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 175 transitions. [2024-01-27 15:35:36,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-01-27 15:35:36,055 INFO L175 Difference]: Start difference. First operand has 374 places, 680 transitions, 10990 flow. Second operand 19 states and 175 transitions. [2024-01-27 15:35:36,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 720 transitions, 12891 flow [2024-01-27 15:35:36,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 720 transitions, 12705 flow, removed 47 selfloop flow, removed 20 redundant places. [2024-01-27 15:35:36,424 INFO L231 Difference]: Finished difference. Result has 376 places, 692 transitions, 11221 flow [2024-01-27 15:35:36,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10804, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11221, PETRI_PLACES=376, PETRI_TRANSITIONS=692} [2024-01-27 15:35:36,425 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 354 predicate places. [2024-01-27 15:35:36,425 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 692 transitions, 11221 flow [2024-01-27 15:35:36,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:36,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:36,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:36,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-27 15:35:36,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:36,626 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:36,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:36,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1091783524, now seen corresponding path program 30 times [2024-01-27 15:35:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:36,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463673924] [2024-01-27 15:35:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:36,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:36,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:36,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463673924] [2024-01-27 15:35:36,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463673924] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:36,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730672033] [2024-01-27 15:35:36,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:35:36,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:36,734 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:36,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 15:35:36,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:35:36,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:36,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:35:36,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:36,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730672033] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:36,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:36,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-27 15:35:36,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109739481] [2024-01-27 15:35:36,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:36,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:35:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:35:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:35:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:36,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 692 transitions, 11221 flow. Second operand has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:36,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:36,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:36,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:37,589 INFO L124 PetriNetUnfolderBase]: 890/1734 cut-off events. [2024-01-27 15:35:37,589 INFO L125 PetriNetUnfolderBase]: For 19581/19581 co-relation queries the response was YES. [2024-01-27 15:35:37,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13772 conditions, 1734 events. 890/1734 cut-off events. For 19581/19581 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10666 event pairs, 193 based on Foata normal form. 124/1855 useless extension candidates. Maximal degree in co-relation 13635. Up to 559 conditions per place. [2024-01-27 15:35:37,610 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 406 selfloop transitions, 76 changer transitions 26/511 dead transitions. [2024-01-27 15:35:37,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 511 transitions, 9290 flow [2024-01-27 15:35:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:35:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:35:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-01-27 15:35:37,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-01-27 15:35:37,611 INFO L175 Difference]: Start difference. First operand has 376 places, 692 transitions, 11221 flow. Second operand 9 states and 93 transitions. [2024-01-27 15:35:37,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 511 transitions, 9290 flow [2024-01-27 15:35:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 511 transitions, 8830 flow, removed 158 selfloop flow, removed 32 redundant places. [2024-01-27 15:35:37,885 INFO L231 Difference]: Finished difference. Result has 338 places, 457 transitions, 7331 flow [2024-01-27 15:35:37,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=7500, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7331, PETRI_PLACES=338, PETRI_TRANSITIONS=457} [2024-01-27 15:35:37,885 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 316 predicate places. [2024-01-27 15:35:37,886 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 457 transitions, 7331 flow [2024-01-27 15:35:37,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:37,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:37,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:37,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:38,100 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:38,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1397184407, now seen corresponding path program 31 times [2024-01-27 15:35:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694160345] [2024-01-27 15:35:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:38,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:38,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694160345] [2024-01-27 15:35:38,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694160345] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:38,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931809241] [2024-01-27 15:35:38,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:35:38,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:38,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:38,203 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:38,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 15:35:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:38,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:35:38,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:38,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:38,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931809241] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:38,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:38,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 18 [2024-01-27 15:35:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146983278] [2024-01-27 15:35:38,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:38,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:35:38,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:35:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:35:38,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 457 transitions, 7331 flow. Second operand has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:39,175 INFO L124 PetriNetUnfolderBase]: 652/1285 cut-off events. [2024-01-27 15:35:39,175 INFO L125 PetriNetUnfolderBase]: For 20520/20520 co-relation queries the response was YES. [2024-01-27 15:35:39,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 1285 events. 652/1285 cut-off events. For 20520/20520 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7341 event pairs, 18 based on Foata normal form. 86/1368 useless extension candidates. Maximal degree in co-relation 10038. Up to 347 conditions per place. [2024-01-27 15:35:39,190 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 126 selfloop transitions, 249 changer transitions 50/428 dead transitions. [2024-01-27 15:35:39,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 428 transitions, 6977 flow [2024-01-27 15:35:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:35:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:35:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 329 transitions. [2024-01-27 15:35:39,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-01-27 15:35:39,191 INFO L175 Difference]: Start difference. First operand has 338 places, 457 transitions, 7331 flow. Second operand 34 states and 329 transitions. [2024-01-27 15:35:39,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 428 transitions, 6977 flow [2024-01-27 15:35:39,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 428 transitions, 6471 flow, removed 125 selfloop flow, removed 33 redundant places. [2024-01-27 15:35:39,335 INFO L231 Difference]: Finished difference. Result has 315 places, 327 transitions, 5579 flow [2024-01-27 15:35:39,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4320, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5579, PETRI_PLACES=315, PETRI_TRANSITIONS=327} [2024-01-27 15:35:39,335 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 293 predicate places. [2024-01-27 15:35:39,335 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 327 transitions, 5579 flow [2024-01-27 15:35:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.333333333333333) internal successors, (132), 18 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:39,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:39,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:39,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-27 15:35:39,536 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:39,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2002344011, now seen corresponding path program 32 times [2024-01-27 15:35:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069045014] [2024-01-27 15:35:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:35:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069045014] [2024-01-27 15:35:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069045014] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614850757] [2024-01-27 15:35:39,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:39,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:39,650 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:39,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 15:35:39,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:39,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:35:39,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:35:39,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:35:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614850757] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:39,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:39,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:35:39,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603577013] [2024-01-27 15:35:39,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:39,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:35:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:35:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:35:39,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:39,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 327 transitions, 5579 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:39,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:40,291 INFO L124 PetriNetUnfolderBase]: 583/1118 cut-off events. [2024-01-27 15:35:40,292 INFO L125 PetriNetUnfolderBase]: For 23162/23162 co-relation queries the response was YES. [2024-01-27 15:35:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9583 conditions, 1118 events. 583/1118 cut-off events. For 23162/23162 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6058 event pairs, 30 based on Foata normal form. 76/1193 useless extension candidates. Maximal degree in co-relation 9468. Up to 772 conditions per place. [2024-01-27 15:35:40,306 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 254 selfloop transitions, 60 changer transitions 4/321 dead transitions. [2024-01-27 15:35:40,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 321 transitions, 6347 flow [2024-01-27 15:35:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:35:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:35:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2024-01-27 15:35:40,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-01-27 15:35:40,307 INFO L175 Difference]: Start difference. First operand has 315 places, 327 transitions, 5579 flow. Second operand 10 states and 87 transitions. [2024-01-27 15:35:40,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 321 transitions, 6347 flow [2024-01-27 15:35:40,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 321 transitions, 5276 flow, removed 424 selfloop flow, removed 35 redundant places. [2024-01-27 15:35:40,460 INFO L231 Difference]: Finished difference. Result has 237 places, 298 transitions, 4511 flow [2024-01-27 15:35:40,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4511, PETRI_PLACES=237, PETRI_TRANSITIONS=298} [2024-01-27 15:35:40,462 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 215 predicate places. [2024-01-27 15:35:40,462 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 298 transitions, 4511 flow [2024-01-27 15:35:40,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:40,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:40,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:40,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-27 15:35:40,665 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2045997200, now seen corresponding path program 33 times [2024-01-27 15:35:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055265740] [2024-01-27 15:35:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055265740] [2024-01-27 15:35:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055265740] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343087806] [2024-01-27 15:35:40,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:40,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:40,784 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 15:35:40,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:35:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:40,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:35:40,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:41,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343087806] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:41,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:41,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:35:41,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607855150] [2024-01-27 15:35:41,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:35:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:35:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:35:41,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 298 transitions, 4511 flow. Second operand has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:41,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:41,397 INFO L124 PetriNetUnfolderBase]: 583/1109 cut-off events. [2024-01-27 15:35:41,397 INFO L125 PetriNetUnfolderBase]: For 13197/13197 co-relation queries the response was YES. [2024-01-27 15:35:41,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 1109 events. 583/1109 cut-off events. For 13197/13197 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5818 event pairs, 59 based on Foata normal form. 42/1150 useless extension candidates. Maximal degree in co-relation 8095. Up to 790 conditions per place. [2024-01-27 15:35:41,409 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 256 selfloop transitions, 74 changer transitions 0/333 dead transitions. [2024-01-27 15:35:41,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 333 transitions, 5456 flow [2024-01-27 15:35:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:35:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:35:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2024-01-27 15:35:41,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-01-27 15:35:41,410 INFO L175 Difference]: Start difference. First operand has 237 places, 298 transitions, 4511 flow. Second operand 10 states and 87 transitions. [2024-01-27 15:35:41,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 333 transitions, 5456 flow [2024-01-27 15:35:41,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 333 transitions, 5317 flow, removed 49 selfloop flow, removed 15 redundant places. [2024-01-27 15:35:41,495 INFO L231 Difference]: Finished difference. Result has 222 places, 298 transitions, 4527 flow [2024-01-27 15:35:41,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4527, PETRI_PLACES=222, PETRI_TRANSITIONS=298} [2024-01-27 15:35:41,495 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2024-01-27 15:35:41,496 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 298 transitions, 4527 flow [2024-01-27 15:35:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.947368421052632) internal successors, (132), 19 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:41,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:41,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:41,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 15:35:41,696 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:41,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1552898690, now seen corresponding path program 34 times [2024-01-27 15:35:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:41,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454300151] [2024-01-27 15:35:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:43,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454300151] [2024-01-27 15:35:43,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454300151] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386645107] [2024-01-27 15:35:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:35:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:43,336 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:43,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 15:35:43,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:35:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:43,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:35:43,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:43,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:35:44,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:44,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 498 treesize of output 234 [2024-01-27 15:35:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:45,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:36:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386645107] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:22,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:22,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2024-01-27 15:36:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816208360] [2024-01-27 15:36:22,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:22,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:36:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:36:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:36:22,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:36:22,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 298 transitions, 4527 flow. Second operand has 33 states, 33 states have (on average 6.696969696969697) internal successors, (221), 33 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:22,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:22,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:36:22,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:27,425 INFO L124 PetriNetUnfolderBase]: 620/1181 cut-off events. [2024-01-27 15:36:27,425 INFO L125 PetriNetUnfolderBase]: For 11832/11832 co-relation queries the response was YES. [2024-01-27 15:36:27,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8720 conditions, 1181 events. 620/1181 cut-off events. For 11832/11832 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6333 event pairs, 48 based on Foata normal form. 1/1181 useless extension candidates. Maximal degree in co-relation 8631. Up to 1027 conditions per place. [2024-01-27 15:36:27,436 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 305 selfloop transitions, 47 changer transitions 6/361 dead transitions. [2024-01-27 15:36:27,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 361 transitions, 5550 flow [2024-01-27 15:36:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:36:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:36:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 242 transitions. [2024-01-27 15:36:27,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42680776014109345 [2024-01-27 15:36:27,437 INFO L175 Difference]: Start difference. First operand has 222 places, 298 transitions, 4527 flow. Second operand 27 states and 242 transitions. [2024-01-27 15:36:27,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 361 transitions, 5550 flow [2024-01-27 15:36:27,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 361 transitions, 5443 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-01-27 15:36:27,522 INFO L231 Difference]: Finished difference. Result has 249 places, 309 transitions, 4730 flow [2024-01-27 15:36:27,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4422, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4730, PETRI_PLACES=249, PETRI_TRANSITIONS=309} [2024-01-27 15:36:27,523 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 227 predicate places. [2024-01-27 15:36:27,524 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 309 transitions, 4730 flow [2024-01-27 15:36:27,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.696969696969697) internal successors, (221), 33 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:27,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:27,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:27,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:27,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 15:36:27,725 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:27,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1197036046, now seen corresponding path program 35 times [2024-01-27 15:36:27,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:27,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977830704] [2024-01-27 15:36:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:27,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:29,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977830704] [2024-01-27 15:36:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977830704] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475039114] [2024-01-27 15:36:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:36:29,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:29,652 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:29,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 15:36:29,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:36:29,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:29,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:36:29,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:29,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-27 15:36:31,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:31,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 505 treesize of output 265 [2024-01-27 15:36:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:31,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:37:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:37:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475039114] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:37:11,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:37:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2024-01-27 15:37:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111394835] [2024-01-27 15:37:11,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:37:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:37:11,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:37:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:37:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:37:11,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:37:11,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 309 transitions, 4730 flow. Second operand has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:11,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:37:11,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:37:11,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:19,989 WARN L293 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 317 DAG size of output: 319 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:37:30,422 WARN L293 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 340 DAG size of output: 332 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:37:48,294 WARN L293 SmtUtils]: Spent 10.83s on a formula simplification. DAG size of input: 331 DAG size of output: 354 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:37:52,222 INFO L124 PetriNetUnfolderBase]: 866/1571 cut-off events. [2024-01-27 15:37:52,223 INFO L125 PetriNetUnfolderBase]: For 20409/20409 co-relation queries the response was YES. [2024-01-27 15:37:52,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 1571 events. 866/1571 cut-off events. For 20409/20409 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8608 event pairs, 46 based on Foata normal form. 1/1571 useless extension candidates. Maximal degree in co-relation 12479. Up to 1159 conditions per place. [2024-01-27 15:37:52,237 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 304 selfloop transitions, 189 changer transitions 6/502 dead transitions. [2024-01-27 15:37:52,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 502 transitions, 8434 flow [2024-01-27 15:37:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:37:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:37:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 375 transitions. [2024-01-27 15:37:52,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699248120300752 [2024-01-27 15:37:52,238 INFO L175 Difference]: Start difference. First operand has 249 places, 309 transitions, 4730 flow. Second operand 38 states and 375 transitions. [2024-01-27 15:37:52,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 502 transitions, 8434 flow [2024-01-27 15:37:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 502 transitions, 8287 flow, removed 51 selfloop flow, removed 15 redundant places. [2024-01-27 15:37:52,377 INFO L231 Difference]: Finished difference. Result has 283 places, 426 transitions, 7647 flow [2024-01-27 15:37:52,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7647, PETRI_PLACES=283, PETRI_TRANSITIONS=426} [2024-01-27 15:37:52,378 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 261 predicate places. [2024-01-27 15:37:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 426 transitions, 7647 flow [2024-01-27 15:37:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.5588235294117645) internal successors, (223), 34 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:52,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-27 15:37:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 15:37:52,579 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:52,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 293828462, now seen corresponding path program 36 times [2024-01-27 15:37:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505251408] [2024-01-27 15:37:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505251408] [2024-01-27 15:38:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505251408] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437926798] [2024-01-27 15:38:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:38:14,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:14,086 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:14,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 15:38:14,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:38:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:14,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:38:14,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:14,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:38:15,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:38:15,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 212 [2024-01-27 15:38:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:16,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:38:57,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437926798] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:57,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:57,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2024-01-27 15:38:57,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891160278] [2024-01-27 15:38:57,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:38:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:57,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:38:57,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:38:57,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:38:57,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 426 transitions, 7647 flow. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 34 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:57,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:57,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:38:57,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:03,824 INFO L124 PetriNetUnfolderBase]: 899/1622 cut-off events. [2024-01-27 15:39:03,825 INFO L125 PetriNetUnfolderBase]: For 22103/22103 co-relation queries the response was YES. [2024-01-27 15:39:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13825 conditions, 1622 events. 899/1622 cut-off events. For 22103/22103 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8896 event pairs, 76 based on Foata normal form. 1/1622 useless extension candidates. Maximal degree in co-relation 13715. Up to 1364 conditions per place. [2024-01-27 15:39:03,841 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 378 selfloop transitions, 102 changer transitions 6/489 dead transitions. [2024-01-27 15:39:03,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 489 transitions, 9143 flow [2024-01-27 15:39:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:39:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:39:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 268 transitions. [2024-01-27 15:39:03,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-01-27 15:39:03,842 INFO L175 Difference]: Start difference. First operand has 283 places, 426 transitions, 7647 flow. Second operand 30 states and 268 transitions. [2024-01-27 15:39:03,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 489 transitions, 9143 flow [2024-01-27 15:39:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 489 transitions, 7661 flow, removed 715 selfloop flow, removed 17 redundant places. [2024-01-27 15:39:04,033 INFO L231 Difference]: Finished difference. Result has 301 places, 442 transitions, 6833 flow [2024-01-27 15:39:04,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6833, PETRI_PLACES=301, PETRI_TRANSITIONS=442} [2024-01-27 15:39:04,034 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 279 predicate places. [2024-01-27 15:39:04,034 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 442 transitions, 6833 flow [2024-01-27 15:39:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 34 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:39:04,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:04,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:04,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-01-27 15:39:04,249 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:04,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1226759714, now seen corresponding path program 37 times [2024-01-27 15:39:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:04,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138450543] [2024-01-27 15:39:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138450543] [2024-01-27 15:39:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138450543] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:09,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498783618] [2024-01-27 15:39:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:39:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:09,162 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:09,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-27 15:39:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:09,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:39:09,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:10,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:39:10,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 521 treesize of output 265 [2024-01-27 15:39:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:11,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:17,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:39:17,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 5564 treesize of output 1684 [2024-01-27 15:40:09,599 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-01-27 15:40:09,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-01-27 15:40:09,601 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-01-27 15:40:09,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-27 15:40:09,801 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:516) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-01-27 15:40:09,806 INFO L158 Benchmark]: Toolchain (without parser) took 542961.74ms. Allocated memory was 127.9MB in the beginning and 1.9GB in the end (delta: 1.8GB). Free memory was 59.3MB in the beginning and 712.2MB in the end (delta: -652.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-01-27 15:40:09,806 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:40:09,806 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.27ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 59.2MB in the beginning and 127.0MB in the end (delta: -67.8MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2024-01-27 15:40:09,806 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.58ms. Allocated memory is still 155.2MB. Free memory was 127.0MB in the beginning and 124.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:40:09,806 INFO L158 Benchmark]: Boogie Preprocessor took 77.87ms. Allocated memory is still 155.2MB. Free memory was 124.9MB in the beginning and 121.7MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:40:09,806 INFO L158 Benchmark]: RCFGBuilder took 825.51ms. Allocated memory is still 155.2MB. Free memory was 120.7MB in the beginning and 80.3MB in the end (delta: 40.4MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2024-01-27 15:40:09,807 INFO L158 Benchmark]: TraceAbstraction took 541717.51ms. Allocated memory was 155.2MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 79.2MB in the beginning and 712.2MB in the end (delta: -633.0MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-01-27 15:40:09,807 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 127.9MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.27ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 59.2MB in the beginning and 127.0MB in the end (delta: -67.8MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.58ms. Allocated memory is still 155.2MB. Free memory was 127.0MB in the beginning and 124.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 77.87ms. Allocated memory is still 155.2MB. Free memory was 124.9MB in the beginning and 121.7MB in the end (delta: 3.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 825.51ms. Allocated memory is still 155.2MB. Free memory was 120.7MB in the beginning and 80.3MB in the end (delta: 40.4MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. * TraceAbstraction took 541717.51ms. Allocated memory was 155.2MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 79.2MB in the beginning and 712.2MB in the end (delta: -633.0MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:40:11,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:40:11,548 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-01-27 15:40:11,552 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:40:11,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:40:11,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:40:11,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:40:11,583 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:40:11,584 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:40:11,587 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:40:11,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:40:11,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:40:11,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:40:11,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:40:11,589 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:40:11,589 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:40:11,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:40:11,590 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:40:11,590 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:40:11,590 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:40:11,590 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:40:11,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:40:11,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:40:11,592 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-01-27 15:40:11,592 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-01-27 15:40:11,592 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:40:11,592 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-01-27 15:40:11,592 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:40:11,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:40:11,593 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:40:11,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:40:11,594 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:40:11,594 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:40:11,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:40:11,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:40:11,595 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:40:11,595 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:40:11,595 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:40:11,596 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-01-27 15:40:11,596 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-01-27 15:40:11,596 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:40:11,596 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:40:11,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:40:11,597 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:40:11,597 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:40:11,597 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-01-27 15:40:11,597 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-01-27 15:40:11,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:40:11,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:40:11,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:40:11,865 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:40:11,866 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:40:11,867 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-01-27 15:40:12,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:40:13,003 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:40:13,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c [2024-01-27 15:40:13,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19818277b/2810ea27c7474e2d8dff8909ecbd1d8b/FLAG765809007 [2024-01-27 15:40:13,032 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19818277b/2810ea27c7474e2d8dff8909ecbd1d8b [2024-01-27 15:40:13,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:40:13,035 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:40:13,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:40:13,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:40:13,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:40:13,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3090bb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13, skipping insertion in model container [2024-01-27 15:40:13,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:40:13,224 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2024-01-27 15:40:13,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:40:13,252 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-01-27 15:40:13,259 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:40:13,278 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2024-01-27 15:40:13,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:40:13,295 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:40:13,322 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-1.wvr.c[2781,2794] [2024-01-27 15:40:13,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:40:13,341 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:40:13,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13 WrapperNode [2024-01-27 15:40:13,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:40:13,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:40:13,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:40:13,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:40:13,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,368 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,400 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 271 [2024-01-27 15:40:13,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:40:13,403 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:40:13,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:40:13,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:40:13,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,417 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,441 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 2, 7]. 54 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:40:13,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,469 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:40:13,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:40:13,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:40:13,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:40:13,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (1/1) ... [2024-01-27 15:40:13,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:40:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:13,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:40:13,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:40:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:40:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:40:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:40:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:40:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:40:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-01-27 15:40:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-01-27 15:40:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:40:13,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-01-27 15:40:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-01-27 15:40:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-01-27 15:40:13,550 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:40:13,653 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:40:13,654 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:40:14,066 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:40:14,066 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:40:14,411 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:40:14,411 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:40:14,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:40:14 BoogieIcfgContainer [2024-01-27 15:40:14,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:40:14,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:40:14,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:40:14,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:40:14,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:40:13" (1/3) ... [2024-01-27 15:40:14,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df1a128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:40:14, skipping insertion in model container [2024-01-27 15:40:14,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:40:13" (2/3) ... [2024-01-27 15:40:14,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df1a128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:40:14, skipping insertion in model container [2024-01-27 15:40:14,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:40:14" (3/3) ... [2024-01-27 15:40:14,419 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-01-27 15:40:14,426 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:40:14,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:40:14,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:40:14,433 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:40:14,468 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:40:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:40:14,514 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:40:14,514 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:40:14,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:40:14,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:40:14,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:40:14,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:40:14,536 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a98d77a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:40:14,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:40:14,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:40:14,546 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:40:14,546 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:40:14,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:14,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:14,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:14,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 965699174, now seen corresponding path program 1 times [2024-01-27 15:40:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:14,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443945548] [2024-01-27 15:40:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:14,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:14,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-01-27 15:40:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:14,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:40:14,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:14,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:40:14,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:40:14,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443945548] [2024-01-27 15:40:14,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443945548] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:40:14,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:40:14,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:40:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11082351] [2024-01-27 15:40:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:40:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:40:14,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:40:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:40:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:40:14,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:40:14,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:14,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:14,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:40:14,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:15,133 INFO L124 PetriNetUnfolderBase]: 101/166 cut-off events. [2024-01-27 15:40:15,134 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-01-27 15:40:15,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 166 events. 101/166 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 485 event pairs, 9 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 267. Up to 111 conditions per place. [2024-01-27 15:40:15,142 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 28 selfloop transitions, 10 changer transitions 1/42 dead transitions. [2024-01-27 15:40:15,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 42 transitions, 189 flow [2024-01-27 15:40:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:40:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:40:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-01-27 15:40:15,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-01-27 15:40:15,152 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 5 states and 65 transitions. [2024-01-27 15:40:15,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 42 transitions, 189 flow [2024-01-27 15:40:15,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 42 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:40:15,156 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 103 flow [2024-01-27 15:40:15,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2024-01-27 15:40:15,161 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2024-01-27 15:40:15,161 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 103 flow [2024-01-27 15:40:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:15,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:15,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:15,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-01-27 15:40:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:15,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:15,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1541588597, now seen corresponding path program 1 times [2024-01-27 15:40:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915790288] [2024-01-27 15:40:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:15,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:15,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:15,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:15,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-01-27 15:40:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:15,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:40:15,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:15,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:40:15,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:40:15,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915790288] [2024-01-27 15:40:15,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915790288] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:40:15,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:40:15,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:40:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764952223] [2024-01-27 15:40:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:40:15,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:40:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:40:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:40:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:40:15,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:40:15,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:15,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:15,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:40:15,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:15,760 INFO L124 PetriNetUnfolderBase]: 92/154 cut-off events. [2024-01-27 15:40:15,760 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-01-27 15:40:15,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 154 events. 92/154 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 411 event pairs, 6 based on Foata normal form. 6/144 useless extension candidates. Maximal degree in co-relation 225. Up to 124 conditions per place. [2024-01-27 15:40:15,763 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 23 selfloop transitions, 4 changer transitions 10/40 dead transitions. [2024-01-27 15:40:15,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 219 flow [2024-01-27 15:40:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:40:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:40:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-27 15:40:15,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-01-27 15:40:15,770 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 103 flow. Second operand 5 states and 57 transitions. [2024-01-27 15:40:15,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 219 flow [2024-01-27 15:40:15,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 215 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-01-27 15:40:15,773 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 114 flow [2024-01-27 15:40:15,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-01-27 15:40:15,774 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2024-01-27 15:40:15,774 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 114 flow [2024-01-27 15:40:15,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:15,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:15,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:15,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:15,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:15,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -304411754, now seen corresponding path program 1 times [2024-01-27 15:40:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:15,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508414799] [2024-01-27 15:40:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:15,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:15,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:15,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-01-27 15:40:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:16,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:40:16,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:40:16,169 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:40:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508414799] [2024-01-27 15:40:16,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508414799] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:40:16,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:40:16,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:40:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361759619] [2024-01-27 15:40:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:40:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:40:16,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:40:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:40:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:40:16,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:40:16,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:16,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:16,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:40:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:16,308 INFO L124 PetriNetUnfolderBase]: 105/183 cut-off events. [2024-01-27 15:40:16,308 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-01-27 15:40:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 183 events. 105/183 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 503 event pairs, 35 based on Foata normal form. 10/190 useless extension candidates. Maximal degree in co-relation 244. Up to 125 conditions per place. [2024-01-27 15:40:16,310 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 37 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-01-27 15:40:16,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 261 flow [2024-01-27 15:40:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:40:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:40:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-01-27 15:40:16,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-27 15:40:16,311 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 114 flow. Second operand 4 states and 49 transitions. [2024-01-27 15:40:16,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 261 flow [2024-01-27 15:40:16,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 240 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 15:40:16,313 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 128 flow [2024-01-27 15:40:16,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-01-27 15:40:16,314 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2024-01-27 15:40:16,314 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 128 flow [2024-01-27 15:40:16,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:16,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:16,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:16,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:16,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:16,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:16,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1225250257, now seen corresponding path program 2 times [2024-01-27 15:40:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654221489] [2024-01-27 15:40:16,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:40:16,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:16,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:16,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-01-27 15:40:16,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:40:16,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:16,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:40:16,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:40:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654221489] [2024-01-27 15:40:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654221489] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:16,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:40:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-01-27 15:40:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588109217] [2024-01-27 15:40:16,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:40:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:40:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:40:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:40:16,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:40:16,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 128 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:16,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:16,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:40:16,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:17,214 INFO L124 PetriNetUnfolderBase]: 107/204 cut-off events. [2024-01-27 15:40:17,214 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-01-27 15:40:17,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 204 events. 107/204 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 601 event pairs, 0 based on Foata normal form. 18/218 useless extension candidates. Maximal degree in co-relation 604. Up to 79 conditions per place. [2024-01-27 15:40:17,216 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 41 selfloop transitions, 20 changer transitions 1/65 dead transitions. [2024-01-27 15:40:17,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 65 transitions, 389 flow [2024-01-27 15:40:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:40:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:40:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-01-27 15:40:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-01-27 15:40:17,221 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 128 flow. Second operand 9 states and 100 transitions. [2024-01-27 15:40:17,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 65 transitions, 389 flow [2024-01-27 15:40:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 65 transitions, 385 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:40:17,223 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 270 flow [2024-01-27 15:40:17,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=270, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-01-27 15:40:17,224 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-01-27 15:40:17,224 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 270 flow [2024-01-27 15:40:17,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:17,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:17,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:17,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-01-27 15:40:17,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:17,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:17,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1885177135, now seen corresponding path program 1 times [2024-01-27 15:40:17,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:17,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715771226] [2024-01-27 15:40:17,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:17,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:17,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:17,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:17,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-01-27 15:40:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:17,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:40:17,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:40:17,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:40:17,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:40:17,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715771226] [2024-01-27 15:40:17,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715771226] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:17,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:40:17,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-01-27 15:40:17,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168868865] [2024-01-27 15:40:17,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:17,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:40:17,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:40:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:40:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:40:17,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:40:17,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:17,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:17,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:40:17,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:18,137 INFO L124 PetriNetUnfolderBase]: 220/415 cut-off events. [2024-01-27 15:40:18,137 INFO L125 PetriNetUnfolderBase]: For 1789/1822 co-relation queries the response was YES. [2024-01-27 15:40:18,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 415 events. 220/415 cut-off events. For 1789/1822 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1604 event pairs, 62 based on Foata normal form. 26/441 useless extension candidates. Maximal degree in co-relation 1377. Up to 178 conditions per place. [2024-01-27 15:40:18,140 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 80 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-01-27 15:40:18,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 99 transitions, 876 flow [2024-01-27 15:40:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:40:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:40:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-01-27 15:40:18,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-01-27 15:40:18,142 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 270 flow. Second operand 8 states and 91 transitions. [2024-01-27 15:40:18,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 99 transitions, 876 flow [2024-01-27 15:40:18,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 99 transitions, 810 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-01-27 15:40:18,147 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 416 flow [2024-01-27 15:40:18,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=416, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2024-01-27 15:40:18,147 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-01-27 15:40:18,148 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 416 flow [2024-01-27 15:40:18,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:40:18,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:18,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:18,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-01-27 15:40:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:18,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:18,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash 784755636, now seen corresponding path program 1 times [2024-01-27 15:40:18,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:40:18,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115100640] [2024-01-27 15:40:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:40:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:40:18,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:40:18,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-01-27 15:40:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:18,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:40:18,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:18,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:40:18,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 370 treesize of output 128 [2024-01-27 15:40:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:40:18,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:21,412 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-01-27 15:40:21,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 611 treesize of output 309 [2024-01-27 15:41:47,983 WARN L293 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 613 DAG size of output: 613 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-27 15:43:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:43:06,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:43:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115100640] [2024-01-27 15:43:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115100640] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:43:06,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:43:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-01-27 15:43:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288194330] [2024-01-27 15:43:06,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 15:43:06,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:43:06,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:43:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:43:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2024-01-27 15:43:06,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:43:06,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 416 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:43:06,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:43:06,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:43:06,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:43:10,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:12,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:15,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:17,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:21,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:23,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:24,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:26,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:28,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:30,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:32,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:34,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:35,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:37,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:38,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:40,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:44,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:45,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:48,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:50,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-01-27 15:43:53,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:55,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:43:56,121 INFO L124 PetriNetUnfolderBase]: 246/469 cut-off events. [2024-01-27 15:43:56,122 INFO L125 PetriNetUnfolderBase]: For 1817/1817 co-relation queries the response was YES. [2024-01-27 15:43:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 469 events. 246/469 cut-off events. For 1817/1817 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1901 event pairs, 10 based on Foata normal form. 2/471 useless extension candidates. Maximal degree in co-relation 1507. Up to 331 conditions per place. [2024-01-27 15:43:56,126 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 51 selfloop transitions, 25 changer transitions 4/83 dead transitions. [2024-01-27 15:43:56,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 733 flow [2024-01-27 15:43:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:43:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:43:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-01-27 15:43:56,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-01-27 15:43:56,128 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 416 flow. Second operand 7 states and 85 transitions. [2024-01-27 15:43:56,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 733 flow [2024-01-27 15:43:56,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 705 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-01-27 15:43:56,133 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 565 flow [2024-01-27 15:43:56,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=565, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2024-01-27 15:43:56,134 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2024-01-27 15:43:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 565 flow [2024-01-27 15:43:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:43:56,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:43:56,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:43:56,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:43:56,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:43:56,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:43:56,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:43:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash -757815026, now seen corresponding path program 2 times [2024-01-27 15:43:56,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:43:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091637954] [2024-01-27 15:43:56,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:43:56,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:43:56,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:43:56,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:43:56,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-01-27 15:43:56,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:43:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:43:56,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:43:56,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:43:58,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:43:58,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 370 treesize of output 128 [2024-01-27 15:44:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:44:00,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:44:08,054 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-01-27 15:44:08,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 611 treesize of output 309 Killed by 15